6.A set of data describes the relationship between the size of annual salary raises and theperformance ratings for employees of a certain company.The least squares regressionequation isˆy= 1400 + 2000xwhereyis the raise amount (in dollars) andxis theperformance rating.Which of the following statements isnotnecessarilytrue?
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7.A least-squares regression line for predicting weights of basketball players on the basis oftheir heights produced the residual plot below.What does the residual plot tell you about the linear model?86848280787674723020100-10-20HEIGHTRESIDUALResiduals versus Height
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© 2011 BFW PublishersThe Practice of Statistics, 4/e- Chapter 3121