A researcher would like to estimate p the proportion of US a

A researcher would like to estimate p, the proportion of U.S. adults who support recognizing civil unions between gay or lesbian couples.

If the researcher would like to be 95% sure that the obtained sample proportion would be within 1.5% of p (the proportion in the entire population of U.S. adults), what sample size should be used?

A 17,778

B 4,445

C 1,112

D 67

E 45

Solution

If the researcher would like to be 95% sure that the obtained sample proportion would be within 1.5% of p (the proportion in the entire population of U.S. adults), what sample size should be used?


1/n(squared) so 1/.015squared = 4444.4444 = B 4445