A set of X and Y scores has the mean of X values is 4, the mean of the Y values is 5 SS_x = 15 SP = 30 What is the regression equation for predicting Y from X? Y = 2x - 3 Y = 3x + 2 Y = 2X + 3 Y = 1 - x + 13 Y = 10x - 3
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The slope b is calculated as SP/SSx. Given that SP is 30 and SSx is 15, the slope b is 30/15 = 2. The Y-intercept a is calculated as mean of Y - b * mean of X. Given that the mean of Y is 5 and the mean of X is 4, the Y-intercept a is 5 - 2 * 4 = -3. Show more…
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