AP Statistics Unit 2 Interpretations

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Statistics

Linear Regression and Correlation

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7 Terms

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Correlation (r)

the linear association between x and y is weak/moderate/strong (strength) and positive/negative (direction)

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Residual

the actual y was residual above/below the predicted value when x=#.

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y-intercept (a)

the predicted y when x=0 context is y-intercept

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Slope (b)

the predicted y increases/decreases by slope for each additional x

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Standard Deviation of Residuals (s)

the actual y is typically about s away from the value predicted by the LSRL

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Coefficient of Determination

about r²% of the variation in y can be explained by the linear relationship with x

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Describe the relationship (DUFS)

The scatter plot reveals a strength, postive/negative, form (linear), assocation between x and y. The point (x,y) is a potential outlier.