What are the values for SS and variance for the following sample of n = 3 scores? Sample: 1,4,7
A)SS = 18 and variance = 6
B)SS = 18 and variance = 9
C)SS = 66 and variance = 22
D)SS = 66 and variance = 33

Question

What are the values for SS and variance for the following sample of n = 3 scores?​ Sample: 1,4,7
A)​SS = 18 and variance = 6
B)​SS = 18 and variance = 9
C)​SS = 66 and variance = 22
D)​SS = 66 and variance = 33

Quizplus · Accepted Answer

To find SS, we need to first find the mean of the sample:

Mean = (1+4+7)/3 = 4

Now, we can calculate SS:

SS = (1-4)² + (4-4)² + (7-4)² = 9+0+9 = 18

To find variance, we use the formula:

Variance = SS / (n-1) = 18 / 2 = 9

Therefore, the correct choice is B.

What Are the Values for SS and Variance for the Following