Standard Deviation (SD) for Grouped Data Calculation: Shortcut Method Quick Trick | Statistics

Note: The shortcut method of finding mean applies only when the class interval are equal
Dr. Manishika Jain explains Standard Deviation (SD) for Grouped Data Calculation: Shortcut Method Quick Trick | Statistics

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When the observations for different places or periods are expressed in different units of measurement and are to be compared, the coefficient of variation (CV) proves very useful. CV expresses the standard deviation as a percentage of the mean
Coefficient of Variation for grouped data can also be calculated using the same formula
Standard Deviation is the positive square root of the average of squares of deviation about mean. Here greater weightage is given to higher deviation along mean. #examrace #upsc #ugcnet

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