The variance of the scores 1, 2, 3, 4, 5 is
...The variance of the scores 1, 2, 3, 4, 5 is
1, 2
1, 4
2.0
3.0
Correct answer is C
| x | 1 | 2 | 3 | 4 | 5 | sum =15 |
| x−ˉx | -2 | -1 | 0 | 1 | 2 | |
| (x−ˉx)2 | 4 | 1 | 0 | 1 | 4 | 10 |
Mean = 155=3
Variance=∑(x−ˉx)2n
= 105
= 2.0
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