The number of degrees of freedom associated with the t-test, when the data are gathered from a matched pairs experiment with 40 pairs, is: $\begin{array}{|l|l|}
\hline\text { A. } & 38 . \
\hline \text { B. } & 39 . \
\hline \text { C. } & 1 . \
\hline \text { D. } & 2 . \
\hline
\end{array}$

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The Answer of The number of degrees of freedom associated with the t-test, when the data are gathered from a matched pairs experiment with 40 pairs, is: $\begin{array}{|l|l|}
\hline\text { A. } & 38 . \
\hline \text { B. } & 39 . \
\hline \text { C. } & 1 . \
\hline \text { D. } & 2 . \
\hline
\end{array}$

The Number of Degrees of Freedom Associated with the T-Test