To introduce some numerical and graphical summary methods. This will result in curve called ogive. Hence, 60% of 360′ or 216° are counted off as shown in the diagram; this sector represents the proportion of high achievers students. A chart can represent tabular numeric data, functions or some kinds of quality structure and provides different info. in each end with a frequency of O. It allows us to relate and compare the data for different time periods. To plot this graph first we have to convert, the class intervals into their exact limits. TYPES OF CHARTS There are two types of charts 1. It represents the data in graphic form. 3. Presentation on GRAPHICAL REPRESENTATION OF STATISTICAL DATA BY MD SAMSER ALI 15BEDB042/KC 2. Line diagram 2. 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. There are different types of graphical representation. When the median as a measure of central tendency is 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. The point at which two lines intersect is called an origin ‘O’. Pie chart 5. Obtain the frequency distribution and find the midpoints of each class interval. Histogram 3. Plagiarism Prevention 4. In order to complete the figure two additional intervals at the high end and low end of the distribution should be included. Therefore put a break in the X axis () to indicate that the vertical axis has been moved in for convenience. Algebraic principles are applied to all types of graphical representation of data. 2. Graphical representation is the visual display of data using plots and charts. 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. 1. Graphs are also easy to understand and eye catching. A line plot is a number line with x’s placed above speciﬁc numbers to show their frequency. Graphical representation helps to quantify, sort and present data in a method that is understandable to a large variety of audience. These are Histogram, Smoothed frequency graph and Ogive or Cumulative frequency graph and pie diagram. It provides knowledge of how the scores in one or more group are distributed. Graphical Representation is a way of analysing numerical data. Ultimately, however, all data types are stored as binary digits. We are going to consider the following types of graphical representation : 1. 2. On the Y axis distances above the origin have a positive value and below the origin have a negative value. 2. Graphic representation is another way of analysing numerical data. This part of the course has the following objectives: 1. 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. A method and device for the pictorial representation of space-related data, for example, geographical data of the earth. There are two types of graphs to visually depict the information. 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. (Statisticians also call numerical data quantitative data.) 4. Graphical representation can be used for both the educated section and uneducated section of the society. Good graphical representation _____ data-ink and erases as much non-data-ink as possible. It … 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. Put dots at each of the coordinating points of the upper limit and the corresponding frequencies. 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". It makes the comparison of data more efficient. 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). Draw a vertical line through the extreme end of the horizontal axis known as OY axis. 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. Join now. Using the midpoint and the frequency value from the above table, plot the points A (5, 0), B (15, 4), C (25, 6), D (35, 8), E (45, 10), F (55, 12), G (65, 14), H (75, 7), I (85, 5) and J (95, 0). Now we have to plot the cumulative frequencies in respect to their corresponding class-intervals. Data, in mathematical and scientific speak, is a group of information collected. Log in. Now draw rectangular bars in parallel to Y axis above each of the class intervals with class units as base: The areas of rectangles must be proportional to the frequencies of the cor­responding classes. In the early days of computing, data consisted primarily of text and numbers, but in modern-day computing, there are lots of different multimedia data types, such as audio, images, graphics and video. It is easy to understand and it is one of the most important learning strategies. It is possible to plot two distributions at a time on same axes. Graphs also enable us in studying both time series and frequency distribution as they give clear account and precise picture of problem. Mark off the class intervals in the X-axis. It is better to start with c.i. In graphs, it is represented using two lines called coordinate axes. Furthermore, any hidden trend present in the given data can be noticed only in this mode of representation. For each data type, there are very specific techniques to convert between the binary language of computers … We are going to consider the followin… Our eyes are drawn to colors and patterns. Ø In order to attract the attention of the audience, Graphical Representation method is usually adopted. Content Guidelines 2. Represent the cumulative frequencies along the Y-axis begin­ning with zero at the base. Graphs help to measure the extent of change in one variable when another variable changes by a certain amount. 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. Along this line mark off the units to represent the frequencies of the class intervals. pie chart, bar chart, etc. 2. Below are given the steps to draw an ogive. it is used in many academic and professional disciplines but most widely so in the field of mathematics, medicine and the science. It always depends on the type of information in a particular domain. It is a mathematical picture. Graphical Representation of Statistical data 1. The construction of this pie diagram is quite simple. Let us discuss how to draw a frequency polygon: Draw a horizontal line at the bottom of graph paper named ‘OX’ axis. Mark the class interval along x-axis and frequencies along the y-axis. 2. 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. Draw the frequency polygon for the following data. The pie-diagram is useful when one wishes to picture proportions of the total in a striking way. 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. Then we have to calculate the cumulative frequencies of the distribution. It helps us to understand the distribution easily and quickly. Comparison of two distributions can be made through frequency polygon. 3. Computer science. Graphical and numerical summaries of data come under the joint heading of ex-ploratory data analysis. 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. Numbers of degrees may be measured off “by eye” or more accurately with a protractor. 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. 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. Represent the midpoints along x-axis and frequencies along the y-axis. 2. Non-numerical data represents characteristics such as a person’s gender, marital status, hometown, ethnicity or the types of movies people like. Let us make an in-depth study of the graphical representation of statistical data. Whether the scores are piled up at the lower or higher end of the distribution or are evenly and regularly distributed throughout the scale. Graphs enable us in studying the cause and … Before plotting the graph we have to convert the class into their exact limits. 7.3: Here we have to first convert the class intervals into their exact limits. A commonly used graphical display for representing frequencies, or counts, is a bar graph, or bar chart. Copyright 10. Where these two lines intersect each other is called ‘0’ or the Origin. Presenting the data includes the pictorial representation of the data by using graphs, charts, maps and other methods. On the other hand, non-numerical data, also called categorical, qualitative or Yes/No data, is data that can be observed, not measured. When the lowest score in the distribution is a large number we cannot show it graphically if we start with the origin. 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