Question

The following data values represent a population. What is the variance of the

values?
8, 10, 14,4
A. 14
B. 10
C. 9
D. 13

Answer 1

D: 13

1. So first you write down your equation ( its on the picture I posted)
2. Then you need to find the mean which is the sum of all the values over the number of values you have (n)
3. After finding your mean, you subtract it from every value you have. To check if what you have done is correct you add all the values you got after subtracting, if you get 0 your answer is correct.
4. Then you square each of those answers you get after you subtract.
5. You get the total which you then divide by the number of values you have (n)

I hope you understand, I am not that good at explaining. And I am not completely sure with my answer, but I think it's correct.