Question

Chrysler Concorde: Acceleration Consumer reports stated that the mean time for a Chrysler Concorde to go from 0 to 60 miles per hour was 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 as an alternative hypothesis?

c.) Suppose a newer model year Chrysler Concorde came out and you wanted to test whether the average time to accelerate from 0 to 60 miles per hour had changed from the previous year. What would you use as an alternative hypothesis?

d.) 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 as an alternative hypothesis?

e.) For each of the tests in parts (b), (c), and (d) , would the P-value area be on the left, on the right, or on both sides of the mean?

Answer 1

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