What are the values for ss and variance for the following sample of n = 3 scores? sample: 1, 4, 7

What are the values for SS and variance for the following sample of n = 3 scores? Sample: 1, 4, 7a.SS = 18 and variance = 6b.SS = 18 and variance = 9c.SS = 66 and variance = 22d.SS = 66 and variance = 33Answer - B

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Phillip W.

asked • 01/30/17

Please provide what the best answer is :

a. SS = 9 and variance = 2.25b. SS = 18 and variance = 9c. SS = 18 and variance = 6

d. SS = 9 and variance = 3

1 Expert Answer

The correct answer is (d)

Mean value = (1+1+0+4)/4 = 1.5

SS = [(1-1.5)^2 + (1-1.5)^2 + (0-1.5)^2 + (4-1.5)^2] = 9

Variance = SS/n-1 = 9/3 = 3

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