A set of sample scores from an experiment has an n 30 and, Ask an Expert

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A set of sample scores from an experiment has an N 30 and an Xobt 19.

a. Can we reject the null hypothesis that the sample is a random sample from a normal population with 22 and 8? Use 0.011 tail. Assume the sample mean is in the correct direction.

b. What is the power of the experiment to detect a real effect such that real 20?

c. What is the power to detect a real 20 if N is increased to 100?

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