Two Samples of Sizes 35 and 50 Are Independently Drawn

Short Answer

Two samples of sizes 35 and 50 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 are: $\begin{array}{ | l | l | } \hline \text { A. } & 84 . \\\hline \text { B. } & 85 . \\\hline \text { C. } & 83 . \\\hline \text { D. } & 34 . \\\hline\end{array}$