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Find the standard deviation of 2, 3, 5 and 6

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Find the standard deviation of 2, 3, 5 and 6

A.

√6

B.

√10

C.

25

D.

52

Correct answer is D

xxˉx(xˉx)2224311511624x=16(xˉx2)=10
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ˉx = xN

= 164

= 4

S = (xˉx)2N

= (10)4

= (5)2