To find the range of a set of data, you must add up numbers and divide by how many number there are subtract the smallest number from the largest find the middle number find the number that occurs the most

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