A researcher computes the definitional formula for SS,as finds that ∑(x-M)= 112.If this is a sample of 20 scores,then what would the value of population variance be using the computational formula?
A)5.6
B)5.9
C)112
D)not possible to know because the scores are not given

Question

Quizplus · Accepted Answer

The computational formula for population variance is σ^2 = SS/(N-1), where SS is the sum of squares and N is the sample size. In this case, SS = 112 and N = 20, so σ^2 = 112/(20-1) = 5.6.

A Researcher Computes the Definitional Formula for SS,as Finds That