Gujarati
13.Statistics
easy

The $S.D$ of $15$ items is $6$ and if each item is decreased or increased by $1$, then standard deviation will be

A

$5$

B

$7$

C

$\frac{91}{15}$

D

$6$

Solution

(d) If each item of a data is increased or decreased by the same constant, the standard deviation of the data remains unchanged.

Standard 11
Mathematics

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