A sample with a sample proportion of 0.5 and which of the following sizes will produce the widest 95% confidence interval when estimating the population parameter?

A. 70
B. 60
C. 50
D. 80

Question

A sample with a sample proportion of 0.5 and which of the following sizes will produce the widest 95% confidence interval when estimating the population parameter?

A. 70
B. 60
C. 50
D. 80

kj4uts · Answer

I think the answer is D. 80 because a larger sample size produces a tighter confidence interval. I just want to check.

anonymous · Answer

I get sample size need 4 for 50
sample size needed 3 for 60
sample size needed 2 for 70
sample size need 2 for 80

anonymous · Answer

But I could be wrong

kj4uts · Answer

you might be right maybe it is the other ways around with the smaller number (50) being the answer. I am just not sure what the answer is.

anonymous · Answer

Yea I am not sure either on how you do it but I get 50 for the highest sample size for

kj4uts · Answer

@Niguyver your right it is 50 thanks for your help :)

anonymous · Answer

no problem