Question: A manufacturer of cars that have had a poor quality

A manufacturer of cars that have had a poor quality rating in the past wants to estimate the average annual maintenance expenditure for its entry-level compact in the third year of its life. A random sample of 60 customers with such cars is selected, and annual maintenance costs are tracked. Create a 98% confidence interval estimate for the annual maintenance spending on this car in the third year of its life.



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  • CreatedJuly 12, 2015
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