Chrysler Concorde: Acceleration Consumer Reports stated that the average time for a Chrysler Concorde to go from 0 to 60 miles per hour is 8.7 seconds.

(a) If you want to set up a statistical test to challenge the claim of 8.7 seconds, what would you use for the null hypothesis?

(b) The town of Leadville, Colorado, has an elevation over 10,000 feet. Suppose you wanted to test the claim that the average time to accelerate from 0 to 60 miles per hour is longer in Leadville (because of less oxygen). What would you use for the alternate hypothesis?

(c) Suppose you made an engine modification and you think the average time to accelerate from 0 to 60 miles per hour is reduced. What would you use for the alternate hypothesis?

(d) For each of the tests in parts

(b) and (c), would the P-value area be on the left, on the right, or on both sides of the mean? Explain your answer in each case.

For Problems 24–29, please provide the following information.

(a) What is the level of significance? State the null and alternate hypotheses. Will you use a left-tailed, right-tailed, or two-tailed test?

(b) Check Requirements What sampling distribution will you use? Explain the rationale for your choice of sampling distribution. Compute the z value of the sample test statistic.

(c) Find (or estimate) the P-value. Sketch the sampling distribution and show the area corresponding to the P-value.

(d) Based on your answers in parts

(a) to (c), will you reject or fail to reject the null hypothesis? Are the data statistically significant at level a?

(e) Interpret your conclusion in the context of the application.

AppendixLO1