Calculating and testing the Pearson correlation involves calculating nine things: ΣX², (ΣX)², ΣY², (ΣY)², SS_X, SS_Y, SP_XY, r, and the critical values. How many of these nine things can be a negative number? A) 0 B) 1 C) 2 D) 3

Question

Quizplus · Accepted Answer

The three items that can be negative are: ΣX² (sum of the products of deviations of X), ΣY² (sum of the products of deviations of Y), and r (Pearson correlation coefficient). These involve differences or relationships that can be negative, reflecting inverse relationships or negative trends in the data.

Calculating and Testing the Pearson Correlation Involves Calculating Nine Things