Solution: Conversion of absolute values into percentage. We willÂ not spam your account… ÃÂ Bar diagram is further divided into FOUR types: ÃÂ Items are to be compared with respect to a single characteristic. The diagrammatic representation of data is one of the best and attractive way of presenting data as it caters both educated and uneducated section of the society. Chart: A sheet exhibiting information in the tabulated or methodical form is also known as a chart. That is, in histogram rectangles are erected on the class intervals of the distribution. A side by side comparison of bar graph vs histogram shows that the bars in the former need … ÃÂ Height of the bar is proportional to the magnitude of the item in the class. Frequency Curve • Rose diagram: It is similar to histogram, by constructed as a rose shape on a circular diagram . Sometimes, the technique uses a three-dimensional visualization which is then projected onto a two-dimensional surface. A histogram is a bar graph-like representation of data that buckets a range of outcomes into columns along the x-axis. ÃÂ The area of blocks in the histogram clearly shows the frequency of each class. In a histogram the width of the rectangle is proportional to the class interval under consideration, and the height is the associated frequency. It consists of a set of adjoining rectanglesdrawn on a horizontal base line. Frequency Polygon 3. ÃÂ Can derive the conclusion from data very quickly. This preview shows page 79 - 81 out of 314 pages.. c. Diagrammatic representation d. None 16. Data Representation 3: Graphs (Line Diagram, Bar Diagram & Histogram) + PPT, @. Please See Your E-Mail…, Graphical Representation of Data PPT (Power Point Presentation), @. Your email address will not be published. ÃÂ The line diagram is the simplest method of graphical representation. To construct a histogram… Mid-points given: If only the mid-points are given, the distribution must be converted into a continuous one in the exclusive series. Diagrammatic and graphic representation – simple, multiple, component and percentage bar diagram – pie chart – histogram. Bar Graph and Histogram are the two ways to display data in the form of a diagram. ÃÂ Different colors or shades are used to distinguish different bars in a single set, Example: Draw a bar diagram using the following data showing the pass percentage of different subjects in five years. Data Representation 4: Graphs (Frequency Curve, Ogive & Pie Chart) + PPT, Please Share for your Students, Colleagues, Friends and Relatives…. ÃÂ The height of the column corresponds to the magnitude of the frequency. Example: Construct a histogram using the following data. Thus, a histogram is a graphical representation of a frequency distribution with class intervals or attributes as the base and frequency as the height. To construct a histogram, the first step is to " bin " (or " bucket ") the range of values—that is, divide the entire range of values into a series of intervals—and then count how many values fall into each interval. Any histogram is known to be an accurate representation of the distribution of numerical data. Disadvantages of Graphical Representation of Data. ÃÂ In a vertical bar diagram, the independent variables are shown on the X axis, while the dependent variables are shown on the Y axis. For a histogram, the frequency distribution should be continuous and exclusive. ÃÂ Bars are drawn vertically or horizontally with equal spacing between them. As they both use bars to display data, people find it difficult to differentiate the two. A histogram is an approximate representation of the distribution of numerical data. Unlike in a bar chart, the bars in a histogram can be of unequal width. ÃÂ Allow comparison of multiple sets of variables comparison. diagrammatic presentation of data-bar diagram & pie diagram 1. It is easy to understand and it is one of the most important learning strategies. ÃÂ Different colours or shades are used to distinguish the compartments of the bar. Data Representation 1: Tables & Tabulation + PPT, @. Example: Number of science graduate students in a college is given below. The width of the bar remains the same if the class interval is equal and the width may vary in case of unequal class intervals. ÃÂ Graphs are only a supplement to the tabular presentation of data. (Diagrammatic Data Representation: Line Chart, Bar Diagrams and Histogram) Graphical Representation of Data / Variables Ø The data presentation in statistics may be Numerical or Graphical. Diagrammatic representation of data : An attractive representation of statistical data is provided by charts, diagrams and pictures. The diagrammatic representation of data is one of the best and attractive way of presenting data as it caters both educated and uneducated section of the society. While constructing a histogram, the following considerations should be made. Diagrammatic representation can be used for both the educated section and uneducated section of the society. Measures of central tendency – mean median, mode, geometric mean, harmonic mean for raw data. Suppose that four coins are flipped and the results are recorded. In histogram, the bars are placed continuously side by side with no gap between adjacent bars. ÃÂ The data become more logical (clear). ÃÂ The data presentation in statistics may be Numerical or Graphical. histogram a diagrammatic representation of a FREQUENCY DISTRIBUTION, consisting of contiguous rectangles displaying interval-level data (see CRITERIA AND LEVELS OF MEASUREMENT) grouped into categories. ÃÂ The size of various compartments is proportional to the magnitude of the variables. P3. ÃÂ A graph should have a self-explanatory heading. Furthermore, any hidden trend present in the given data can be noticed only in this mode of representation. The word graph is sometimes used as a synonym for diagram. Matplotlib: Histogram. Open-end classes: In the case of open-end classes, the histogram cannot be constructed. The diagram above shows us a histogram. So if there is a priority for accur… ÃÂ Bar diagram is a chart that presents grouped data with rectangular bars. ... • Histogram: It is based on the bases of statistics of graphical representation of data clustering. points to be taken care of while constructing a histogram. Advantages of Graphical Representation of Data. Size of the graph should fit in the case of frequency distribution is called a histogram information visualization. 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