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

Multiple Choice

An entrepreneur is considering the purchase of a coin-operated laundry. The current owner claims that over the past 5 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