Question

From a survey of coworkers you find that

64​%

of

175

have already received this​ year's flu vaccine. An approximate

98​%

confidence interval is

​(0.556​,

0.724​).

​a) How would the confidence interval change if the sample size had been

700

instead of

175​?

​b) How would the confidence interval change if the confidence level had been

95​%

instead of

98%?

​c) How would the confidence interval change if the confidence level had been

99​%

instead of

98​%?

Select the correct choice below and fill in the answer box within your choice.

A.The new confidence interval would be narrower. The standard error would be divided by a factor of __.

B.The new confidence interval would be wider. The standard error would be multiplied by a factor of

__.

Answer 1