Calculate the standard deviation of the following marks; ...
Calculate the standard deviation of the following marks; 2, 3, 6, 2, 5, 0, 4, 2
1.5
1.7
1.8
1.9
Correct answer is C
| x | 2 | 3 | 6 | 2 | 5 | 0 | 4 | 2 | 24 |
| x - ˉx | -1 | 0 | 3 | -1 | 2 | -3 | 1 | -1 | |
| (x−ˉx)2 | 1 | 0 | 9 | 1 | 4 | 9 | 1 | 1 | 26 |
Mean = 248=3
Standard deviation = √268
= √3.25
= 1.802 \approeq 1.8