# Question: Land s End wants to determine the average age of customers

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.

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.

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