Lands End wants to determine the average age of customers who purchase products through its catalog sales

Question:

Land’s End wants to determine the average age of customers who purchase products through its catalog sales department. The company has contacted a simple random sample of 5 customers, with the following results:

Assume the population distribution of customer ages is normal.

a. Compute the sample average, x, and the sample standard deviation, s.

b. Show the 90% confidence interval estimate of the average age of this customer population.

Distribution
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