A Regional Hardware Chain Is Interested in Estimating the Proportion

question 163

Multiple Choice

A regional hardware chain is interested in estimating the proportion of their customers who own their own homes. There is some evidence to suggest that the proportion might be around 0.70. Given this, what sample size is required if they wish a 90 percent confidence level with a margin of error of ±.025?

• A) About 355
• B) Approximately 910
• C) Almost 1,300
• D) 100

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Definitions:

Simple Interest

A method of calculating the interest charge on a loan or financial investment based on the initial principal and a fixed interest rate over time.

Interest Rate

The proportion, typically expressed as a percentage, at which interest is charged on a loan or paid on savings.

Like Terms

Terms that have the same variables raised to the same power, which can be combined by adding or subtracting the coefficients.

Parentheses

Parentheses are symbols used in mathematics to group terms or to indicate the order of operations.