ALL ABOUT STATS

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? 1. State the Null and Alternative Hypotheses IV. Solve for the computed value (2pts) (3pts) Given: II. Choose the appropriate statistical test (1pt) Ill. Determine the Level of Significance and the V. Make the Decision and Conclusion Critical Value (2pts) (2pts)