Question
Medium
Solving time: 3 mins
If and , then the standard deviation of the 9 items is (a) 9 (b) 4 (c) 2 (d) 3
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Text solutionVerified
Key idea Standard deviation is remain unchanged, if observations are added or subtracted by a fixed number.
We have,
and
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Question Text | If and , then the standard deviation of the 9 items is
(a) 9
(b) 4
(c) 2
(d) 3 |
Updated On | Nov 25, 2022 |
Topic | Statistics |
Subject | Mathematics |
Class | Class 11 |
Answer Type | Text solution:1 Video solution: 2 |
Upvotes | 162 |
Avg. Video Duration | 4 min |