Question

Marine scientists categorize signature whistles of bottlenose dolphins by typel—type ​a, type​ b, type​ c, etc. In one study of a sample of 185 whistles emitted from bottlenose dolphins in​ captivity, 95 were categorized as type a whistles.

a. Estimate the true proportion of bottlenose dolphin signature whistles that are type a whistles. Use a 99% confidence interval.The 99% confidence interval is

​(______,________). ​(Round to the nearest hundredth as​ needed.)

b. Interpret the result. Choose the correct answer below.

A.We are 99​% confident that the true proportion of bottlenose dolphin signature whistles that are type a whistles is in interval found in previous step.

B.We are 99% confident that the true proportion of bottlenose dolphin signature whistles that are type a whistles is not in interval found in previous step.

C. We are​ 100% confident that the true proportion of bottlenose dolphin signature whistles that are type a whistles is in interval found in previous step.

D.We are 1​% confident that the true proportion of bottlenose dolphin signature whistles that are type a whistles is in interval found in previous step.

Answer 1