A researcher is studying the mean weight of a killer whale S

A researcher is studying the mean weight of a killer whale. She collects sample data and computes a confidence interval. Using the same data, she decides to increase the confidence level and creates a new confidence interval. What happens to the confidence interval?

            A.      

It gets narrower.

            B.      

It stays the same.

            C.      

Impossible to determine without the numbers.

            D.      

It gets wider.

Solution

increase the confidence level, increase the wider of the confidence interval

Answer: D It gets wider.