Two samples of size 30 each are independently drawn from two normal populations, where the unknown population variances are assumed to be equal. The number of degrees of freedom of the equal-variances t-test statistic is 59.

Question

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The degrees of freedom for the equal-variances t-test statistic is calculated as the sum of the sample sizes minus 2, which is 30 + 30 - 2 = 58.

Two Samples of Size 30 Each Are Independently Drawn from Two