The Width of a Confidence Interval Estimate for a Proportion

question 150

Multiple Choice

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

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

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