Find the critical value for $α = 0.01$ with $df = 22$ for a left tailed (lower tailed) test.

−2.508

The correct answer is Option (2) → −2.508

Given $α = 0.01, df = 22$.

See area in right tail (upper tail) 0.01 in topmost row against degree of freedom 22 in leftmost column. The critical value is 2.508 and for left tail (lower tail) critical value is -2.508 (: curve is symmetric).

Hence, the critical value for left tailed test is -2.508.