20. A set of sample scores from an experiment has an N 30 and an x = 19. a. Can

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20. A set of sample scores from an experiment has an N 30 and an x = 19. a. Can we reject the null hypothesis that the sample is a random sample from a normal population with mu= 22 and sigma=8? Use a=0.01.Assume the sample mean is in the correct direction. b. What is the power of the experiment to detect a real effect such that Mu real= 20? c. What is the power to detect a Mu real 20 if N is increased to 100? d. What value does N. have to equal to achieve a power of 0.8000 to detect a Mu real= 20? Use the nearest table value for zobt, other

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20. A set of sample scores from an experiment has an N 30 and an x = 19. a. Can

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