Question 521:
The width of a confidence estimate for a proportion will be:a. Narrower for a 99% confidence interval than for a 95% confidence interval.
b. Wider for a sample size of 100 than for a sample size of 50.
c. Narrower for 90% confidence than for 95% confidence
d. Narrower when the sample proportion is .50 than when the sample proportion is .20.