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Calculate the standard deviation of the following data: 7...

Calculate the standard deviation of the following data: 7, 8, 9, 10, 11, 12, 13.

A.

2

B.

4

C.

10

D.

11

Correct answer is A

xxx(xx)2739824911100111111224133928

S.D = (xx)2N

= d2N

= 287

= 4

= 2