Question: A sample is selected from a population with a mean of m 5 60 and a treatment is administered to the individuals in the sample.

A sample is selected from a population with a mean of m 5 60 and a treatment is administered to the individuals in the sample. If a hypothesis test is used to evaluate the treatment effect, then what is the correct statement of the null hypothesis?

a. m 5 60

b. m ? 60

c. M 5 60

d. M ? 60

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