Question: 1. A sample is selected from a population with a mean of M = 30 and a treatment is administered to the sample. If the

1. A sample is selected from a population with a mean of M = 30 and a treatment is administered to the sample. If the treatment is expected to increase scores and at statistic is used for a one-tailed hypothesis test, then which of the following is the correct null hypothesis? a. u 30 b. u < 30 C. u 30 d. u > 30

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