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Width of a Confidence Interval

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The width of a confidence interval estimate for a proportion will be:

A. narrower for 99% confidence than for 95% confidence
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 0.50 than when the sample proportion is 0.20.

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C. 90% Confidence Interval would be narrower than a 95% ...

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