Keeping the sample size and sample proportion the same, the width of a confidenc

Question

Keeping the sample size and sample proportion the same, the width of a confidence interval for a population proportion will be, in general,

a) narrower when the sample proportion is 0.50 than when the sample proportion is 0.20.

b) narrower when the sample proportion is 1000 than when the sample proportion is 100.

c) narrower for 90% confidence than for 95% confidence.

d) wider for a sample size of 100 than for a sample size of 50.

e) narrower for 99% confidence than for 95% confidence.

a) narrower when the sample proportion is 0.50 than when the sample proportion is 0.20.

Explanation / Answer

Keeping the sample size and sample proportion the same, the width of a confidence interval for a population proportion will be, in general,

ANSWER

c) narrower for 90% confidence than for 95% confidence.

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