A researcher computes the computational formula for SS,as finds that ∑x = 39 and ∑x² = 271.If this is a sample of 6 scores,then what would SS equal using the definitional formula? A)17.5 B)3.5 C)232 D)not possible to know because the sample mean is not given

Question

Quizplus · Accepted Answer

The definitional formula for SS is SS = ∑(x - M)², where M is the mean. The mean M = ∑x / n = 39 / 6 = 6.5. SS = ∑x² - (∑x)²/n = 271 - (39)²/6 = 271 - 253.5 = 17.5.

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