In a Left-Tailed Test Comparing Two Means with Variances Unknown

Multiple Choice

In a left-tailed test comparing two means with variances unknown but assumed to be equal, the sample sizes were n₁ = 8 and n₂ = 12. At α = .05, the critical value would be:

A) -1.960
B) -2.101
C) -1.734
D) -1.645