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?