# Question: A dentist wants to find the average time taken by

A dentist wants to find the average time taken by one of her hygienists to take X-rays and clean teeth for patients. She recorded the time to serve 24 randomly selected patients by this hygienist. The data (in minutes) are as follows:

Assume that such times for this hygienist for all patients are approximately normal.

a. What is the point estimate of the corresponding population mean.

b. Construct a 99% confidence interval for the average time taken by this hygienist to take X-rays and to clean teeth for all patients.

Assume that such times for this hygienist for all patients are approximately normal.

a. What is the point estimate of the corresponding population mean.

b. Construct a 99% confidence interval for the average time taken by this hygienist to take X-rays and to clean teeth for all patients.

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