33. Start the car! In October 2002, Consumer Reports
Chapter 27, Problem 33(choose chapter or problem)
33. Start the car! In October 2002, Consumer Reports listedthe price (in dollars) and power (in cold cranking amps)of auto batteries. We want to know if more expensive batteriesare generally better in terms of starting power. Hereare several software displays: a) How many batteries were tested?b) Are the conditions for inference satisfied? Explain.c) Is there evidence of an association between the costand cranking power of auto batteries? Test an appropriatehypothesis and state your conclusion.d) Is the association strong? Explain.e) What is the equation of the regression line?f) Create a 90% confidence interval for the slope of thetrue line.g) Interpret your interval in this context.
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