The following table gives information on the limited tread warranties (in thousands of miles) and the...

 

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The following table gives information on the limited tread warranties (in thousands of miles) and the prices of 12 randomly selected tires at a national tire retailer as of July 2009 Pressure (psi) 7.8 8.1 8.3 7.4 8.9 7.2 8.6 7.5 8.1 8.5 Bounce height (inches) 54.1 54.3 55.2 53.3 55.4 52.2 55.7 54.6 54.8 55.3 a. Taking warranty length as an independent variable and price per tire as a dependent variable, compute SSxx, SS, and SSxy. b. Find the regression of price per tire on warranty length. c. Briefly explain the meaning of the values of a and b calculated in part b. d. Calculate r and r2 and explain what they mean. e. Plot the scatter diagram and the regression line. f. Predict the price of a tire with a warranty length of 73,000 miles. g. Compute the standard deviation of errors. The following table gives information on the limited tread warranties (in thousands of miles) and the prices of 12 randomly selected tires at a national tire retailer as of July 2009 Pressure (psi) 7.8 8.1 8.3 7.4 8.9 7.2 8.6 7.5 8.1 8.5 Bounce height (inches) 54.1 54.3 55.2 53.3 55.4 52.2 55.7 54.6 54.8 55.3 a. Taking warranty length as an independent variable and price per tire as a dependent variable, compute SSxx, SS, and SSxy. b. Find the regression of price per tire on warranty length. c. Briefly explain the meaning of the values of a and b calculated in part b. d. Calculate r and r2 and explain what they mean. e. Plot the scatter diagram and the regression line. f. Predict the price of a tire with a warranty length of 73,000 miles. g. Compute the standard deviation of errors.