The Width of a Confidence Interval Estimate for a Proportion

question 84

Multiple Choice

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

• A) wider for a sample size of 100 than for a sample size of 50.
• B) narrower when the sample proportion is 0.50 than when the sample proportion is 0.20.
• C) narrower for 90% confidence than for 95% confidence.
• D) narrower for 99% confidence than for 95% confidence.

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