Cigarettes Is the nicotine content of a cigarette related to the tars A collection of

Chapter 7, Problem 37

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Cigarettes Is the nicotine content of a cigarette related to the tars? A collection of data (in milligrams) on 29 cigarettes produced the scatterplot, residuals plot, and regression analysis shown: T Dependent variable is Home Attendance R-squared = 28.4, Variable Coefficient Constant -6760.5 Wins 431.22 Tar (mg) Nicotine (mg) 0.6 0.3 1.2 4 8 12 16 0.9 Predicted Residuals 0.075 0.150 0.075 0.3 0.6 0.9 1.2 0.000 Dependent variable is: nicotine R squared = 92.4, Variable Coefficient Constant 0.154030 Tar 0.065052 a) Do you think a linear model is appropriate here? Explain. b) Explain the meaning of R2 in this context.

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