To make the diagram attractive the bars can be

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Unformatted text preview: est value in the series. To make the diagram attractive, the bars can be coloured. Bar diagram are used in business and economics. However, an important limitation of such diagrams is that they can present only one classification or one category of data. For example, while presenting the population for the last five decades, one can only depict the total population in the simple bar diagrams, and not its sex-wise distribution. 70 Example 2: Represent the following data by a bar diagram. Year Production (in tones) 1991 1992 1993 1994 1995 45 40 42 55 50 Solution: Simple Bar Diagram 60 Production (in tonnes) 50 40 30 20 10 0 1991 1992 1993 1994 1995 Year Multiple Bar Diagram: Multiple bar diagram is used for comparing two or more sets of statistical data. Bars are constructed side by side to represent the set of values for comparison. In order to distinguish bars, they may be either differently coloured or there should be different types of crossings or dotting, etc. An index is also prepared to identify the meaning of different colours or dottings. 71 Example 3: Draw a multiple bar diagram for the following data. Profit before tax Profit after tax Year ( in lakhs of rupees ) ( in lakhs of rupees ) 1998 195 80 1999 200 87 2000 165 45 2001 140 32 Solution: Profit (in Rs) Multiple Bar Diagram 200 180 160 140 120 100 80 60 40 20 0 1998 1999 2000 2001 Year Profit before tax Profit after tax Sub-divided Bar Diagram: In a sub-divided bar diagram, the bar is sub-divided into various parts in proportion to the values given in the data and the whole bar represent the total. Such diagrams are also called Component Bar diagrams. The sub divisions are distinguished by different colours or crossings or dottings. The main defect of such a diagram is that all the parts do not have a common base to enable one to compare accurately the various components of the data. Example 4: Represent the following data by a sub-divided bar diagram. 72 Monthly expenditure (in Rs.) Family A Family B 75 95 20 25 15 10 40 65 25 35 Expenditure items Food Clothing Education Housing Rent Miscellaneous Solution: Sub-divided Bar Diagram Monthly expenditure (in Rs) 240 220 200 180 160 140 120 100 80 60 40 20 0 Family A Expenditure item Food Clothing Housing Rent Family B Education Miscellaneous Percentage bar diagram: This is another form of component bar diagram. Here the com...
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This note was uploaded on 01/18/2014 for the course BUS 100 taught by Professor Moshiri during the Winter '08 term at UC Riverside.

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