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Calculate the mean and S.D. for the foll...

Calculate the mean and S.D. for the following data: Expenditure (in Rs.) 0-10 10-20 20-30 30-40 40-50 Frequency: 14 13 27 21 15

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The correct Answer is:
The standard deviation is `12.86`
By using the formula to find standard deviation: $$ \mathrm{SD}=\sqrt{\operatorname{Var}(\mathrm{X})} $$ ...
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RD SHARMA-STATISTICS-Solved Examples And Exercises
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