(a) What is the minimum sample size needed assuming that no prior information is available?

n=24012401

(Round up to the nearest whole number as needed.)Part 2(b) What is the minimum sample size needed using a prior study that found that

40%

of the respondents said they think Congress is doing a good or excellent job?

n=23052305

(Round up to the nearest whole number as needed.)Part 3(c) How do the results from (a) and (b) compare?

A.

Having an estimate of the population proportion has no effect on the minimum sample size needed.

Your answer is not correct.

B.

Having an estimate of the population proportion raises the minimum sample size needed.

C.

Having an estimate of the population proportion reduces the minimum sample size need