Find the difference between the range and the variance of the following set of numbers 4, 9, 6, 3, 2, 8, 10, 5, 6, 7 where (sum d^2) = 60
-
A.
2 -
B.
3 -
C.
4 -
D.
6
Correct Answer: Option A
Explanation
Range : 10 – 2 = 8
Variance = (frac{sum d^{2}}{n})
= (frac{60}{10})
= 6
8 – 6 = 2.