Find the standard deviation of the numbers 3,6,2,1,7 and ...
Find the standard deviation of the numbers 3,6,2,1,7 and 5.
2.00
2.16
2.50
2.56
Correct answer is B
| x | 3 | 6 | 2 | 1 | 7 | 5 | Total = 24 |
| x−ˉx | -1 | 2 | -2 | -3 | 3 | 1 | |
| (x−ˉx)2 | 1 | 4 | 4 | 9 | 9 | 1 | 28 |
ˉx=246=4
S.D=√∑(x−ˉx)2n
= √286=√4.667=2.16
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