If d is the standard deviation x, y, and z, what is the standard deviation of x + 5, y + 5, z + 5 ?
A. d
B. 3d
C. 15d
D. d + 5
E. d + 15
OA A
Source: GMAT Prep
If d is the standard deviation x, y, and z, what is the standard deviation of x + 5, y + 5, z + 5 ?
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Adding the same value to each value in a set does not change the standard deviation of the set.BTGmoderatorDC wrote: ↑Tue Jan 25, 2022 5:48 pmIf d is the standard deviation x, y, and z, what is the standard deviation of x + 5, y + 5, z + 5 ?
A. d
B. 3d
C. 15d
D. d + 5
E. d + 15
OA A
Source: GMAT Prep
So, the standard deviation of {x + 5, y + 5, z + 5 } will also be d.
Answer: A