The equal-variances test statistic of $\mu _ { 1 } - \mu _ { 2 }$ is Student t-distributed with n₁ + n₂ degrees of freedom, provided that the two populations are normal.

Name: The equal-variances test statistic of $\mu _ { 1 } - \mu _ { 2 }$ is Student t-distributed with n 1 + n 2 degrees of freedom, provided that the two populations are normal.
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Quizplus · Accepted Answer

The equal-variances test statistic is Student t-distributed with $ n_1 + n_2 - 2 $ degrees of freedom, not $ n_1 + n_2 $.

The Equal-Variances Test Statistic Of μ1−μ2\mu _ { 1 } - \mu _ { 2 }μ1​−μ2​

The Equal-Variances Test Statistic Of $\mu _ { 1 } - \mu _ { 2 }$