According to Autolist.com, the most popular car for millennials is the Honda Civic. However, according to JDPower.com,
Question:
According to Autolist.com, the most popular car for millennials is the Honda Civic. However, according to JDPower.com, the average age of a Civic driver is actually 50. Suppose you draw a random sample of 18 Civic drivers and find the average age of the drivers to be 52.5 years. Assume the standard deviation for the age of Civic drivers is 2.5 years.
a. Construct a 95% confidence interval to estimate the average age of a Civic driver.
b. What assumption needs to be made for this procedure?
c. Does this result lend support to the claim by JDPower.com?
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