Russia covers about 1/30 of the earth surface. the area of russia is about 1 2/3 times the area of canada. what fraction of the earth surface does canada cover?
explain and show me how you received you answer.

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