Question
Question: The S.D of 15 items is 6 and if each item is decreased or increased by 1, then standard deviation wi...
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
91/15
D
6
Answer
6
Explanation
Solution
If each item of a data is increased or decreased by the same constant, the standard deviation of the data remains unchanged.