Question

A set of n = 5 pairs of x and y scores has sx = 15, sy = 5, and sxy = 10. for these data, what is the value of sp?

Answer 1

Given that a set of n = 5 pairs of x and y scores has sx = 15, sy = 5, and sxy = 10.

For this set of data, the value of SP is given by:

$SP=\Sigma XY-\frac{\Sigma X\Sigma Y}{n} \\ \\ =10- \frac{15\times5}{5} =10-15 \\ \\ =-5$