# Question

Several drugs are used to treat diabetes. A sales specialist for a leading pharmaceutical company needs an estimate of the number of new prescriptions that were written during a particular month for his company’s new diabetes drug. The numbers of new prescriptions in a random sample of 25 sales districts are as follows:

a. Find a 90% confidence interval for the average number of new prescriptions written for this new drug among all the sales districts. State the assumptions.

b. Calculate the widths for 95% and 98% confidence intervals.

a. Find a 90% confidence interval for the average number of new prescriptions written for this new drug among all the sales districts. State the assumptions.

b. Calculate the widths for 95% and 98% confidence intervals.

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