Question: ESP. People who claim to "have ESP" participate in a screening test in which they have to guess which of several images someone is thinking of. You and a friend both took the test. You scored 2 standard deviations above the mean, and your friend scored 1 standard deviation below the mean. The researchers offer everyone the opportunity to take a retest.
a) Should you choose to take this retest? Explain.
b) Now explain to your friend what his decision should be and why.