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Presentation of Data
What are multiple bar diagrams?
Multiple bar diagrams are used when two or more sets of inter-related variables are to be presented graphically for comparison. A set of simple adjacent bars is drawn. Comparisons can be made either between two or more variable or magnitudes of one variables in two or more aspects.
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Data represented through a histogram can help in finding graphically the:
Ogives can be helpful in locating graphically the:
Data represented through arithmetic line graph help in understanding:
Width of bars in a bar diagram need not be equal.
Width of rectangles in a histogram should essentially be equal.
Histogram can only be formed with continuous classification of data.
Histogram and column diagram are the same method of presentaton of data.
Mode of a frequency distribution can be known graphically with the help of histogram.
Median of a frequency distribution cannot be known from the ogives.
What kind of diagrams are more effective in representing the following:
(i) Monthly rainfall in a year.
(ii) Composition of the population of Delhi by religion.
(iii) Components of cost in a factory.
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