Standard normal distribution . assume that adults have iq scores that are normally distributed with a mean of 100 and a standard deviation 20. find p15, which is the iq score separating the bottom 15% from the top 85%

Kilgore trout creates a new scale to diagnose depression. however, his scale only assesses one symptom of depression while ignoring others. which of the following is his new scale most likely lacking? a) test-retest reliability b) discriminant validity c) criterion validity d) alternate-forms reliability e) content validity f) none of the above