1. A particular brand of tires claims that its deluxe tire averages at least 55,000 miles before it needs to be replaced. A survey of owners of that tire design is conducted. From the 45 tires...

a. State the Null and Alternative Hypotheses

b. Choose the appropriate statistical test

c. Determine the Level of Significance and the Critical Value & Solve for the computed value

Extracted text: 1. A particular brand of tires claims that its deluxe tire averages at least 55,000 miles before it needs to be replaced. A survey of owners of that tire design is conducted. From the 45 tires surveyed, the mean lifespan was 46,400 miles with a standard deviation of 6,800 miles. Using a=0.05, is the data highly inconsistent with the claim?