A Sample of 37 AA Batteries Had a Mean Lifetime

question 40

Multiple Choice

A sample of 37 AA batteries had a mean lifetime of 584 hours. A 95% confidence interval for the population mean was 579.2 < μ < 588.8. Which statement is the correct interpretation of the results?

• A)We are 95% confident that the mean lifetime of all the bulbs in the population is between 579.2 hours and 588.8 hours.
• B)The probability that the population mean is between 579.2 hours and 588.8 hours is 0.95.
• C)95% of the light bulbs in the sample had lifetimes between 579.2 hours and 588.8 hours.
• D)None of these statements correctly interpret the results.

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Definitions:

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Non-compensatory Rule

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Compensatory Rule

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