The variance of the scores 1, 2, 3, 4, 5 is

A.
1, 2 
B.
1, 4 
C.
2.0 
D.
3.0
Correct Answer: Option C
Explanation
(x)  1  2  3  4  5  sum =15 
(x – bar{x})  2  1  0  1  2  
((x – bar{x})^{2})  4  1  0  1  4  10 
Mean = (frac{15}{5} = 3)
(Variance = frac{sum (x – bar{x})^{2}}{n})
= (frac{10}{5})
= (2.0)