Question: A hypothesis test is conducted to test whether the mean age of clients at a certain health spa is equal to 25 or not. It

A hypothesis test is conducted to test whether the mean age of clients at a certain health spa is equal to 25 or not. It is known that the population standard deviation of clients at the spa is 10. 36 clients are randomly selected, and their ages recorded, with the sample mean age being 22.8. What is the test statistic of the hypothesis test in this case?

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