The Width of a Confidence Interval Estimate for a Proportion

question 73

Multiple Choice

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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Definitions:

Risk-free Rate

The theoretical return on an investment with zero risk, typically represented by government bonds or bills of a stable government.

Exchange Rates

The price at which one currency can be exchanged for another, influencing international trade and investments.

Pesos

The currency used in several countries, including Mexico and the Philippines, symbolizing the monetary unit.

Bolivars

The currency of Venezuela.