The last step when figuring the correlation coefficient is to
A)multiply the sum of the cross-products of Z scores by the sample size.
B)divide the sum of the cross-products of Z scores by the sample size.
C)add the sample size to the sum of the cross-products of Z scores.
D)subtract the sample size from the sum of the cross-products of Z scores.

Question

Quizplus · Accepted Answer

The correlation coefficient is calculated by dividing the sum of the cross-products of Z scores by the sample size. This final calculation standardizes the values between -1 and 1, which is the range for the correlation coefficient. Multiplying or adding the sample size to the sum of the cross-products of Z scores would not produce the correct result. Subtracting the sample size from the sum of the cross-products of Z scores would result in a negative number, which is not valid for the correlation coefficient.

The Last Step When Figuring the Correlation Coefficient Is to