All but one of the following statements contains an

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5.All but one of the following statements contains an error.Which statement could becorrect?(a)There is a correlation of 0.54 between the position a football player plays and his weight.(b) We found a correlation ofr= –0.63 between gender and political party preference.(c) The correlation between the distance travelled by a hiker and the time spent hiking isr= 0.9 meters per second.(d) We found a high correlation between the height and age of children:r= 1.12.(e) The correlation between mid-August soil moisture and the per-acre yield of tomatoes isr= 0.53.
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?
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
© 2011 BFW PublishersThe Practice of Statistics, 4/e- Chapter 3121
122The Practice of Statistics, 4/e- Chapter 3© 2011 BFW Publishers

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Least Squares, Linear Regression, Regression Analysis, Practice of Statistics, BFW Publishers

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