In testing the difference between the means of two normally distributed populations, if ?1 = ?2 = 50, n1 = 10, and n2 = 13, the degrees of freedom for the t statistic equals ______. 19 21 22 20
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Given are the population means ($\mu_1$ and $\mu_2$), and the sample sizes ($n_1$ and $n_2$). Show more…
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