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Get Full Access to Stats: Data And Models - 4 Edition - Chapter 7 - Problem 47e
Get Full Access to Stats: Data And Models - 4 Edition - Chapter 7 - Problem 47e

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# Last cigarette Take another look at the regression

ISBN: 9780321986498 70

## Solution for problem 47E Chapter 7

Stats: Data and Models | 4th Edition

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Problem 47E

Problem 47E

Last cigarette Take another look at the regression analysis of tar and nicotine content of the cigarettes in Exercise 43.

a) Write the equation of the regression line.

b) Estimate the Nicotine content of cigarettes with 4 milligrams of Tar.

c) Interpret the meaning of the slope of the regression line in this context.

d) What does the y-intercept mean?

e) If a new brand of cigarette contains 7 milligrams of tar and a nicotine level whose residual is -0.5 mg, what is the nicotine content?

Exercise 43:

Cigarettes Is the nicotine content of a cigarette related to the “tar”? A collection of data (in milligrams) on 29 cigarettes produced the scatterplot, residuals plot, and regression analysis shown:

a) Do you think a linear model is appropriate here? Explain.

b) Explain the meaning of R2 in this context.

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