AP Statistics Unit 9 Practice Test: Inference for Quantitative Data: Slopes

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AP Statistics Unit 9 Practice Test: Inference for Quantitative Data: Slopes

Try our AP Stats unit 9 test. This unit is all about linear regression, a method of finding a line of best fit through two-dimensional data. An important topic in this unit is testing the significance of a slope in a regression line. We adopt a null hypothesis that the slope is zero (the x-variable does not affect the y-variable at all) and then see how improbable the data would be.