8, 72, 78,22,15,54,93,61,21,26,68
a. find the mean.
the mean is nothing.
(type an integer or a decimal rounded to one decimal place as needed.)

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