In a left-tailed test comparing two means with unknown variances assumed to be equal, the test statistic was t = -1.81 with sample sizes of n₁ = 8 and n₂ = 12. The p-value would be: A)between .025 and .05. B)between .01 and .025. C)between .05 and .10. D)Must know α to answer.

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The degrees of freedom for the test is 18 (n1 + n2 - 2). For a t-statistic of -1.81 with 18 degrees of freedom, the p-value is between 0.025 and 0.05 in a left-tailed test.

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