An Entrepreneur Is Considering the Purchase of a Coin-Operated Laundry

question 90

Multiple Choice

An entrepreneur is considering the purchase of a coin-operated laundry. The current owner claims that over the past five years, the mean daily revenue was $675 with a population standard deviation of $75. A sample of 30 days reveals a daily mean revenue of $625. If you were to test the null hypothesis that the daily mean revenue was $675, which test would you use?

• A) Z test of a population mean
• B) Z test of a population proportion
• C) t test of population mean
• D) t test of a population proportion

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