Question: A sample is selected from a population with a mean of m 5 30 and a treatment is administered to the sample. If the treatment

A sample is selected from a population with a mean of m 5 30 and a treatment is administered to the sample. If the treatment is expected to increase scores and a t statistic is used for a one-tailed hypothesis test, then which of the following is the correct null hypothesis?

a. m # 30

b. m , 30

c. m $ 30

d. m . 30

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