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7 Cards in this Set
- Front
- Back
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General equation of a straight line
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Y = bX + A
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slope
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b = vertical change/horizontal change
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b is what (in regression of r raw score)
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(r times Sy/Sx)
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a is what (in regression of r raw score)
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(-r times Sy/Sx)Xbar + Ybar
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Regression toward the mean
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when the correlation between two variables is less than perfect, the more extreme the score on one variable, the more likely it will be paired with a less extreme score on the other variable
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coefficient of non determination
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Syx2/Sy2 = 1-r2 ; the proportion of the variance in Y that is not associated with differences in X
k2 is the symbol for the coefficient of nondetermination |
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(Y-Y1)
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This measures the variation of obtained Y scores about the values predicted for them (Y1); it is the variation in Y that remains when X is held constant
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