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A set of n = 15 pairs of X and Y scores has SSX = ...A set of n = 15 pairs of X and Y scores has SSX = 10,SSY = 40, and SP = 30. What is the slope for the regression equation for predicting Y from X?

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Louli
This question is asking only for the slope of the regression equation. This slope can be easily calculated using the following rule:
slope = SP / SSx

Examining the givens, we will find that both parameters are given where:
SP = 30 and SSx = 10

Substituting with the givens in the above mentioned equations, we can calculate the slope as follows:
slope = 30 / 10 = 3

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