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? group of answer choices
a. t test of a population proportion
b. z test of a population mean
c. t test of population mean
d. z test of a population proportion

The answer is B: Z test of a population mean

Step-by-step explanation:

This is the most appropriate test to use. This is because the standard deviation is known from the question as $75 and we are trying to compare a hypothesized mean of $675 from the null hypothesis to a sample mean of $625. Thus the Z test of a population mean is the test required to be used here.

take it another

to determine the unit cost your would divide the total cost by the number sold.

7 bagels for $4.41       $4.41/7 = $.63 each at fresh side

5 bagels for $3.60         $3.60/5 = $.72 each at value mart