?For the Following Data from a Repeated-Measures Study,the Sample Mean

question 13

True/False

?For the following data from a repeated-measures study,the sample mean difference is M_D = 4. $$\begin{array} { l r r } \text { Participant } & X _ { 1 } & X _ { 2 } \\\hline \text { A } & 1 & 7 \\\text { B } & 4 & 8 \\\text { C } & 5 & 3 \\\hline\end{array}$$

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