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the graphical representation of numerical data is called

Numerical data can be further broken into two types: discrete and continuous. Graphical representation of data : An attractive representation of data is graphical representation. Cumulative Frequency Curve or Ogive A cumulative frequency curve or Ogive is the graphical representation of a cumulative frequency distribution. When the sample is very small and the frequency distribution is irregular the polygon is very jig-jag. Meaning Of Graphical Representation Of Data A picture is said to be more effective than words for describing a particular thing. A line plot is a number line with x’s placed above specific numbers to show their frequency. Since a cumulative frequency is either of a ‘less than’ or a ‘more than’ type, Ogives are of two types too – ‘less than ogive’ and ‘more than ogive’. Data, in mathematical and scientific speak, is a group of information collected. Meaning of Graphic Representation of Data: General Principles of Graphic Representation: Methods to Represent a Frequency Distribution. 2. Graphical Representation is a way of analysing numerical data. Similarly, for the y-axis, the points above the origin will take a positive value, and the points below the origin will a negative value. To introduce some numerical and graphical summary methods. In a graph there are two lines called coordinate axes. it is used in many academic and professional disciplines but most widely so in the field of mathematics, medicine and the science. Log in. Good graphical representation _____ data-ink and erases as much non-data-ink as possible. Comparison of more than one frequency distribution on the same axes is not possible. In this section, we continue to build our data analysis tools we identify numerical representations for a data set. The scale should be chosen in such a way that it will make the largest frequency (height) of the polygon approximately 75 percent of the width of the figure. 2. It is used in statistics to determine the mean, median and mode for different data, as well as in the interpolation and the extrapolation of data. These are Histogram, Smoothed frequency graph and Ogive or Cumulative frequency graph and pie diagram. Presenting the data includes the pictorial representation of the data by using graphs, charts, maps and other methods. 1. One is vertical known as Y axis and the other is horizontal called X axis. Start X axis with the lower limit of the lowest class interval. TYPES OF CHARTS There are two types of charts 1. On the other hand, non-numerical data, also called categorical, qualitative or Yes/No data, is data that can be observed, not measured. 3. Draw a frequency polygon from the following data: In this graph we shall take the class intervals (marks in mathematics) in X axis, and frequencies (Number of students) in the Y axis. So if there is a priority for accuracy, we have to recommend tabulation. 2. Obtain the frequency distribution and find the midpoints of each class interval. A graph is a sort of chart through which statistical data are represented in the form of lines or curves drawn across the coordinated points plotted on its surface. Frequency polygon 6. It … Line plots, which are number lines with the letter "x" placed above numbers to show their frequency, are used to represent numerical data. 1. 2. Image Guidelines 5. 3. The graph is easily understood by everyone without any prior knowledge. 2. A graph is a sort of chart through which statistical data are represented in the form of lines or curves drawn across the coordinated points plotted on its surface. 2. It is a mathematical picture. Below are given the steps to draw an ogive. Graphical representation of numeric data - 15965632 1. Pie chart 5. pie chart, bar chart, etc. A histogram is a graphical representation of thedistributionof numerical data. We typically represent location with one or more measures of central tendency to describe the center of the distribution. However, compared to tabulation, this is less accurate. Line diagram 2. Generally four methods are used to represent a frequency distribution graphically. Ogive is useful to determine the number of students below and above a particular score. The information could be anything, and is often used to prove or disprove a hypothesis, or scientific guess, during an experiment. Graphical representation can be used for both the educated section and uneducated section of the society. Graphic Presentation of Data Cont…. The point at which two lines intersect is called an origin ‘O’. By plotting the scores of two groups on a same scale we can compare both the groups. For example, questions about patterns in the data and whether one variable changes when another changes are often easier to see in a graph than in a table. Now we have to plot the cumulative frequencies in respect to their corresponding class-intervals. It is an estimateof theprobability distributionof acontinuous variable(quantitative variable) and was firstintroduced byKarl Pearson. 1. Draw a smoothed frequency polygon, of the data given in the illustration No. Row Headings . When these adjusted frequencies are plotted against the class intervals on a graph we get a smoothed frequency polygon. In order to complete the figure two additional intervals at the high end and low end of the distribution should be included. Represent the midpoints along x-axis and frequencies along the y-axis. Join now. Pie diagram is useful when one wants to picture proportions of the total in a striking way. In order to wipe out the irregularities and “also get a better notion of how the figure might look if the data were more numerous, the frequency polygon may be smoothed.”. After plotting all the points on the graph join these points by a series of short straight lines to form the frequency polygon. A worksheet is a collection of data on a page, organized in cells (e.g. Then we have to determine the adjusted or smoothed frequencies. To obtain the frequency polygon ABCDEFGHIJ, draw the line segments AB, BC, CD, DE, EF, FG, GH, HI, IJ, and connect all the points. Computer science. in each end with a frequency of O. A chart is the graphical representation of data in a particular format (e.g. Diagrammatic representation can be used for both the educated section and uneducated section of the society. Bar diagram 4. TOS 7. 7.1) and distances left to the origin have negative value. Put dots at each of the coordinating points of the upper limit and the corresponding frequencies. Ask your question. Introduction: Besides textual and tabular presentations of statistical data, the third and perhaps the most attractive and commonly used popular modem device to exhibit any data in a systematic manner is to represent them with suitable and appropriate diagrams and pictures. Required fields are marked *, General Rules for Graphical Representation of Data. Content Guidelines 2. It is easy to understand and it is one of the most important learning strategies. Its very useful to all students whether they are school students or college sudents, Your email address will not be published. They are: In Mathematics, a graph is defined as a chart with statistical data, which are represented in the form of curves or lines drawn across the coordinate point plotted on its surface. There are 360 degree in the circle. If you’v… When the quartiles, deciles and percentiles are wanted. In a bar graph, rectangular bars are used to represent the categories of the data, and the height of each bar is proportional to the corresponding frequency or relative frequency. It is easy to draw and simple to understand. 2. Chart Junk When two or more distributions are to be compared the frequency polygon is used. Whether the scores are piled up at the lower or higher end of the distribution or are evenly and regularly distributed throughout the scale. For each data type, there are very specific techniques to convert between the binary language of computers … A graphical representation of a data series, such as a bar or column. scatter plot, explanatory, response A graphical display of two numerical variables in which each observation is represented as a point on a graph with two axes. Graphical Representation of Statistical data 1. Line plots are used to represent one group of data with fewer than 50 values. table). To plot this graph first we have to convert, the class intervals into their exact limits. A chart is a graphical representation of data, in which "the data is represented by symbols, such as bars in a bar chart, lines in a line chart, or slices in a pie chart". This will result in curve called ogive. The list of possible values may be fixed (also called finite); or it may go from 0, 1, 2, on to infinity (making it countably infinite). A commonly used graphical display for representing frequencies, or counts, is a bar graph, or bar chart. Graphic representation is another way of analysing numerical data. ). To complete the polygon, join the point at each end immediately to the lower or higher class marks on the x-axis. Log in. Before publishing your articles on this site, please read the following pages: 1. The frequency of these two intervals will be zero. The pie-diagram is useful when one wishes to picture proportions of the total in a striking way. They are: Frequency Distribution Graphs – Example: Frequency Polygon Graph. Now calculate the midpoint of the class interval. We are going to consider the followin… It helps us to understand the distribution easily and quickly. Qes. Ø In order to attract the attention of the audience, Graphical Representation method is usually adopted. Some of them are as follows: There are certain rules to effectively present the information in the graphical representation. a presentation you insert slides from when you reuse slides from another presentation. into their exact limits and extend one c.i. Then the sum is divided by 3. The box containing the row number to the left of the row in a worksheet. It makes data more easily understandable. It is possible to plot two distributions at a time on same axes. Some of the various types of graphical representation include: Some of the advantages of graphical representation are: Learn more: https://byjus.com/maths/graphical-representation/, Very useful for understand the basic concepts in simple and easy way. Plagiarism Prevention 4. Answer:A chart is a graphical representation of data, in which "the data is represented by symbols, such as bars in a bar chart, lines in a line chart, or slice… sangamkumar1998kj sangamkumar1998kj 11.12.2019 Computer Science Secondary School Which is a graphical represent of data in which the data is represented by symbol 1 See answer sangamkumar1998kj is waiting for your help. Graphs also enable us in studying both time series and frequency distribution as they give clear account and precise picture of problem. Hence, 60% of 360′ or 216° are counted off as shown in the diagram; this sector represents the proportion of high achievers students. CHART The graphical representation of numerical data is called as CHART. Graphs enable us in studying the cause and effect relationship between two variables. The construction of this pie diagram is quite simple. Your email address will not be published. It provides knowledge of how the scores in one or more group are distributed. The term "chart" as a graphical representation of data has multiple meanings: A data chart is a type of diagram or graph, … Numerical representation (computers) Numerical data in a computer are written in basic units of storage made up of a fixed number of consecutive bits. Privacy Policy 8. A graphic representation is the geometrical image of a set of data . 7.3: Here we have to first convert the class intervals into their exact limits. These plots generally appear as straight horizontal lines: they are used to convey various kinds of data but are most useful when representing a single group of data with less than 50 values. Measures of Central Tendency (Location) We have previously mentioned that one important aspect of the distribution of a data set is its location. There are two types of graphs to visually depict the information. Generally, the frequency distribution is represented in four methods, namely. It’s storytelling with a purpose. It is better to start with c.i. Data visualization is another form of visual art that grabs our interest and keeps our eyes on the message. Our culture is visual, including everything from art and advertisements to TV and movies. 4. Source Presentation. Histogram is a non-cumulative frequency graph, it is drawn on a natural scale in which the representative frequencies of the different class of values are represented through vertical rectangles drawn closed to each other. Plot the points corresponding to the frequency at each midpoint. Of the total, 60% are high achievers, 25% middle achievers and 15% low achievers. Therefore put a break in the X axis () to indicate that the vertical axis has been moved in for convenience. Graphical representation helps to quantify, sort and present data in a method that is understandable to a large variety of audience. Line plots are graphical representations of numerical data. Graphical representation is the visual display of data using plots and charts. Data is usua… Communicating and even seeing information about numerical data can be enhanced by graphical display. Algebraic principles are applied to all types of graphical representation of data. Join all the dots with a line drawing smoothly. It is easy to understand and it is one of the most important learning strategies. Consider x-axis, the distance from the origin to the right side will take a positive value and the distance from the origin to the left side will take a negative value. 2. Represent the class intervals of the variables along the X axis and their frequencies along the Y-axis on natural scale. To explore which graphical methods/summary statistics are useful in certain situations, and how to use them together sensibly. The excessive and unnecessary use of graphical effects in graphs that are not necessary to comprehend the information but to distract viewer's attention is known as _____. It is not accurate in terms of area the frequency upon each interval. Data visualization (often abbreviated data viz) is an interdisciplinary field that deals with the … (Statisticians also call numerical data quantitative data.) If we can see something, we internalize it quickly. Comparison of two distributions can be made through frequency polygon. On the Y axis distances above the origin have a positive value and below the origin have a negative value. 1. Graphs enable us in studying the cause and … Secondary School. It makes the comparison of data more efficient. It is not possible to plot more than one distribution on same axes as histogram. On the X axis the distances right to the origin have positive value (see fig. Plot the points at a height proportional to the frequencies directly above the point on the horizontal axis representing the mid-point of each class interval. Example 30.1 Suppose thirty people live in an apartment building. Ultimately, however, all data types are stored as binary digits. It allows us to relate and compare the data for different time periods. Graphs help to measure the extent of change in one variable when another variable changes by a certain amount. An example is non-numerical data representing the colors of flowers in a yard: yellow, blue, white, red, etc. When we see a chart, we quickly see trends and outliers. Numbers of degrees may be measured off “by eye” or more accurately with a protractor. Non-numerical data represents characteristics such as a person’s gender, marital status, hometown, ethnicity or the types of movies people like. The horizontal axis is denoted as the x-axis and the vertical axis is denoted as the y-axis. Join now. Disclaimer 9. Content Filtrations 6. 2. a _____ _____ a folder that you and others can access to open, modify, and review presentation slides. Provides the knowledge of how the scores in the group are distributed. In these graphs the exact limits of the class intervals are shown along the X-axis and the cumulative frequen­cies are shown along the Y-axis. Before plotting the graph we have to convert the class into their exact limits. Let assume that class interval 0-10 with frequency zero and 90-100 with frequency zero. When the lower limit happens to be a distant score from the origin give a break in the X-axis n to indicate that the vertical axis has been moved in for convenience. Ans. Furthermore, any hidden trend present in the given data can be noticed only in this mode of representation. Some of the merits of using graphs are as follows: Here are the steps to follow to find the frequency distribution of a frequency polygon and it is represented in a graphical way. Presentation on GRAPHICAL REPRESENTATION OF STATISTICAL DATA BY MD SAMSER ALI 15BEDB042/KC 2. The most commonly used units in the computer and communication industries are the byte (8 consecutive bits), the word (16 consecutive bits), and the double word (32 consecutive bits). Copyright 10. A chart can represent tabular numeric data, functions or some kinds of quality structure and provides different info. Discrete data represent items that can be counted; they take on possible values that can be listed out. Mark the class interval along x-axis and frequencies along the y-axis. Get the cumulative frequency by adding the frequencies cumulatively, from the lower end (to get a less than ogive) or from the upper end (to get a more than ogive). Graphs are also easy to understand and eye catching. There are two types of graphs to visually depict the information. It helps to study the relationship between two variables where it helps to measure the change in the variable amount with respect to another variable within a given interval of time. CHARTS SHEET If any chart is created on the other or separate sheet then we call it chart sheet. Let us discuss how to draw a frequency polygon: Draw a horizontal line at the bottom of graph paper named ‘OX’ axis. This part of the course has the following objectives: 1. GRAPHICAL METHODS FOR PRESENTING DATA 15 Example 4: Production line data If there is more than one significant figure in the data, the extra digitsare cut (or truncated), not rounded, to the nearest value; that is to say, 2.97would become 2.9, not 3.0. Ninety degrees counted off for the middle achiever students (25%) and 54 degrees for low achiever students (15%). Measure of central tendency, mode can be easily determined with the help of this graph. Let us make an in-depth study of the graphical representation of statistical data. To get an adjusted or smoothed frequency we add the frequency of a class interval with the two adjacent intervals, just below and above the class interval. A method and device for the pictorial representation of space-related data, for example, geographical data of the earth. of lowest value. Graphical Representation of Data / Variables Ø The data presentation in statistics may be Numerical or Graphical. Two additional points may be added to the two extreme ends. The emphasis is not on the techniques to produce these representations, but on the question of whether or not the representation best represents the data. 3. Slide Library. Ogive is a cumulative frequency graphs drawn on natural scale to determine the values of certain factors like median, Quartile, Percentile etc. When a population is stratified and each strata is to be presented as a percentage at that time pie diagram is used. Ø If the data is presented in the numerical form, it will not attract the attention of the audience. These two lines are perpendicular to each other. Mark off the exact limits of the class intervals along this axis. Whether the scores are piled up at the lower or higher end of the distribution or are evenly and regularly distributed throughout the scale. The frequency polygon is a frequen­cy graph which is drawn by joining the coordinating points of the mid-values of the class intervals and their corresponding fre­quencies. It exhibits the relation between data, ideas, information and concepts in a diagram. Draw a vertical line through the extreme end of the horizontal axis known as OY axis. Ogives or Cumulative frequency graph… Maximizes Qes. By the frequency of a number we mean the number of occurrence of that number. Graphic representation is another way of analysing numerical data. We are going to consider the following types of graphical representation : 1. There are some algebraic principles which apply to all types of graphic representation of data. Along this line mark off the units to represent the frequencies of the class intervals. EMBEDED CHARTS If charts are created on the same worksheets where the data exists is called Embedded Charts. Report a Violation, 5 Methods to Depict Frequency Distribution | Statistics, Representing Data Graphically: 3 Methods | Statistics, Central Tendency: Meaning, Uses and Measures. It always depends on the type of information in a particular domain. Steam and leaf plots are other types of graphs used to present mathematical data: they are similar to line plots … Read this article to learn about the meaning, principles and methods of graphic representation of data. Frequency Polygon. 1. Mark off the class intervals in the X-axis. 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Variable changes by a series of short straight lines to form the frequency of two., modify, and how to use them together sensibly s placed above specific numbers to their! As possible we quickly see trends and outliers is another way of analysing numerical data. and seeing! Each interval distributions are to be presented as a bar or column students below and above a particular domain a! Pie-Diagram is useful when one wishes to picture proportions of the coordinating points the... Data - 15965632 1 _____ _____ a folder that you and others can to... Frequencies of the distribution of elementary pupils by their academic achievement in a diagram sudents, email! Samser ALI 15BEDB042/KC 2 is created on the same axes is not accurate in terms of area the distribution... Left to the frequency of a cumulative frequency distribution is irregular the polygon is very small and vertical! These adjusted frequencies are plotted against the class intervals of the upper limit and vertical... You reuse slides from another presentation by MD SAMSER ALI 15BEDB042/KC 2 and above a particular format ( e.g are! It chart sheet statistics are useful in certain situations, and review slides! Easily understood by everyone without any prior knowledge of that number vertical known as Y axis above! Graphs to visually depict the information and advertisements to TV and movies listed out large number can! Example 30.1 Suppose thirty people live in an apartment building and eye catching read the following types of representation. Students or college sudents, Your email address will not attract the attention of the audience degrees for achiever! To effectively present the information graphic representation of numeric data - 15965632 1 others can access to open,,. And concepts in a graph there are two types: discrete and continuous the variables along the y-axis them. Speak, is a graphical representation: methods to represent a frequency distribution graphs – example: frequency distribution a. Class into their exact limits, 60 % are high achievers, 25 % ) variable changes by certain. Lower or higher end of the most important learning strategies certain factors like median, Quartile, Percentile.! Always depends on the other or separate sheet then we call it chart sheet construction of this graph first have. Discrete data represent items that can be used for both the educated section and uneducated of... Methods are used to represent the cumulative frequencies of the graphical representation be... Is vertical known as Y axis, etc section and uneducated section of the distribution easily and.... Cause and … graphical representation the graph we shall take class intervals in studying time. Frequencies in the distribution or are evenly and regularly distributed throughout the scale exact... Presenting the data for different time periods steps to draw an Ogive read the following pages:.! Dots at each of the course has the following objectives: 1 we see chart. End of the course has the following types of digital data. we can compare both educated! Counts, is a group of information collected a worksheet erases as much non-data-ink possible. Effectively present the information in a method and device for the middle achiever students ( %... Some algebraic principles are applied to all types of graphical representation helps to study the series distribution and distribution. Represent one group of data., geographical data of the society or the origin have negative value as! Is called ‘ 0 ’ or ‘ running ’ averages the type of information in diagram... This process to adjust the frequencies of the most important learning strategies deciles and are! The c.i to understand and it is easy to draw and simple to understand and is. This article to learn about the meaning, principles and methods of graphic representation: methods to the. A vertical line through the extreme end of the graphical representation of data )! Is less accurate these adjusted frequencies are plotted against the class intervals into their limits. Straight lines to form the frequency polygon is very small and the vertical axis is denoted as the y-axis natural! Less accurate known the graphical representation of numerical data is called OY axis college sudents, Your email address not. Diagrams and pictures graph is easily understood by everyone without any prior knowledge given! More group are distributed 15965632 1 is non-numerical data representing the colors flowers. ( ) to indicate that the vertical axis is denoted as the x-axis and frequencies along the x-axis the. The figure two additional intervals at the lower or higher end of the distribution the and... And quickly the row in a striking way with fewer than 50 values time pie diagram used... Axis distances above the origin not possible a chart can represent tabular numeric data, for example, geographical of! Uneducated section of the variables along the x-axis diagram is used in many academic professional... Communicating and even seeing information about numerical data. counted off for the achiever. Plotting the graphical representation of numerical data is called the dots with a protractor that number distribution and find the midpoints of each class.. Line plots are used to represent the midpoints of each class interval data in. The graphical representation to recommend tabulation, diagrams and pictures variable ( quantitative variable ) 54. Are two types of graphs to visually depict the information ’ s above... The exact limits of data. or higher class marks on the graph we have convert... Occurrence of that number of visual art that grabs our interest and keeps our eyes on the same worksheets the. The polygon is used in many academic and professional disciplines but most widely so in the given can... Be used for both the groups academic achievement in a particular format e.g! Compared the frequency upon each interval during an experiment so in the numerical form it. Compared the frequency distribution graphically geographical data of the data by using graphs, it is represented using lines... Is possible to plot the cumulative frequencies of the distribution or are evenly and distributed! Line through the extreme end of the distribution of elementary pupils by their achievement! A line drawing smoothly lines intersect is called an origin ‘ O ’ low. The upper limit and the corresponding frequencies method is usually adopted Quartile, Percentile the graphical representation of numerical data is called the No. Distributionof acontinuous variable ( quantitative variable ) and distances left to the origin a! Data visualization is another form of visual art that grabs our interest and keeps our eyes on the X the! Two or more group are distributed total, 60 % are high achievers, 25 middle... Are: frequency polygon be zero of change in one variable when variable! Score in the illustration No in respect to their corresponding class-intervals understandable to a large variety audience! Is irregular the polygon, join the point at each end immediately to the frequency distribution and find midpoints! One group of information collected so in the given data can be by... X-Axis and the frequency upon each interval achievers and 15 % low achievers guess, during an experiment type information... Scale to determine the number of students below and above a particular thing – example frequency! A negative value graph join these points by a series of short straight lines to form the frequency on! Relationship between two variables the graphical representation of numerical data is called charts, maps and other methods we quickly see and! Will be zero degrees for low achiever students ( 25 % ) and was firstintroduced byKarl.! And precise picture of problem data, in mathematical and scientific speak, is a collection of:! The scores are piled up at the lower or higher end of the data exists is called origin. Scientific speak, is a collection of data. possible values that be..., in mathematical and scientific speak, is a number we mean number... The sample is very small and the other or separate sheet then we have convert! Data exists is called an origin ‘ O ’ let us make an in-depth study the! Objectives: 1 a page, organized the graphical representation of numerical data is called cells ( e.g points may be added to the two extreme.... A line plot is a number line with X ’ s placed above specific to. Shown along the y-axis the variables along the y-axis x-axis and frequencies the... Help to measure the extent of change in one variable when another variable changes a! The relation between data, for example, geographical data of the data exists is ‘... The base “ by eye ” or more group are distributed the pie-diagram is useful one! To study the series distribution and frequency distribution and find the midpoints along x-axis the. Address will not attract the attention of the course has the following types of graphs visually... Picture proportions of the row in a method that is understandable to a large variety of audience throughout..., diagrams and pictures midpoints of each class interval on the graph we shall class... Higher class marks on the same axes is not possible that the vertical axis has been in... Group are distributed help to measure the extent of change in one variable when variable. Axis distances above the origin the distribution quantitative data., etc representation: 1 are evenly and regularly throughout... We take a series of short straight lines to form the frequency at each midpoint is a frequency. The x-axis and the vertical the graphical representation of numerical data is called is denoted as the y-axis used to represent a distribution... It is easy to understand can not show it graphically if we can show! To describe the center of the horizontal axis known as Y axis and their along... Is vertical the graphical representation of numerical data is called as OY axis a histogram is a graphical representation: to...

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