Question

Using the square root of x sign above, you will be able to find symbols and equations. Subscripts are also at the top. X2 X2 Now that you have calculated SS. Calculate variance and standard deviation using the same distribution of scores as if it cam from a sample. 3, 7, 8, 5, 6, 4, 9, 10, 7, 8, 6, 5

Answer 1

n = 12

mean () is given by:

x	(x - )	(x - )2
3	-3.5	12.25
7	0.5	0.25
8	1.5	2.25
5	-1.5	2.25
6	-0.5	0.25
4	-2.5	6.25
9	2.5	6.25
10	3.5	12.25
7	0.5	0.25
8	1.5	2.25
6	-0.5	0.25
5	-1.5	2.25
Total = SS =		47.0

Variance (s2) is given by:

Standard Deviation = s =

So,

answers are:

Variance = 4.2727

Standard Deviation = 2.0671