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

Calculate the standard deviation of the following data: 7, 8, 9, 10, 11, 12, 13
A. 2
B. 4
C. 12
D. 17

Correct Option: Answer is A
Solution:

X x-X (x-X)2
7 -3 9
8 -2 4
9 -1 1
10 0 0
11 1 1
12 2 4
13 3 9
28

Standard Deviation SD =〖√(∑▒〖(x-X)〗)〗^2/N

SD= √28/7 = √4 = 2

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