9. How to Choose a TV Consumer Reports11 gave the prices and screen sizes for the top 10 LCD TVs in the 46-inch and higher categories.

Does the price of an LCD TV depend on the size of the screen?

a. Assuming that the relationship between size and price is linear, we perform a linear regression, resulting in a value of r2 .027 5 . What does the value of r2 tell you about the strength of the relationship between price and screen size?

b. The diagnostic plots for this data are shown below.
Does it appear that either the normality or equal variance assumptions have been violated?

c. Use a scatterplot to plot price versus screen size for the 10 LCD TVs. Based on the information in part

a, which assumption for the linear regression model has been violated?

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Brand Price ($) Size Sony Bravia KDL-52NX800 2340 52 Samsung LN55C650 1600 55