chp 8 9

chp 8 9 - Chapters 8 and 9 Linear Regression and Regression...

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Unformatted text preview: Chapters 8 and 9 Linear Regression and Regression Wisdom 1 Calculate a __________________ given summary statistics. Interpret the ____ of the regression line in context. Know when the interpretation of the intercept of the regression line is reasonable given the context. Find predictions and residuals for points. Interpret a _____________. Interpret the ____ value for a regression in context. Describe and apply the limitations of regression. At the end of this chapter, you should be able to 2 __________ = linear relationship between two variables. Summarizes relationship with _____. Called ___________________. Explanatory variable ( x ) Response variable ( y ) Correlation and Regression 3 Explains how _________ variable ( y ) changes in relation to ___________ variable ( x ). Use line to _______ value of y for given value of x . Regression line 4 Mathematical model to provide ____ ft. Predict y From x . The ________ values are called (y hat) Values on the regression line. The ________ values are called y. Points in the scatterplot. Regression line 5 A tip oF 18% will be automatically added to the bill For parties oF size 6 or more. Why is this? Well study using regression. Example: Tipping 6 Predicted values = ______. Summary oF relationship between x and y. Observed values = _____ + ______ Model = summary oF relationship between x and y. Error = amount leFtover that the model doesnt explain. Regression Line 7 Look at vertical distance ______ in regression line. Place line to make these errors as small as possible....
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This note was uploaded on 10/07/2009 for the course STAT 101 taught by Professor Graham during the Fall '08 term at Iowa State.

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chp 8 9 - Chapters 8 and 9 Linear Regression and Regression...

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