The following output (from (mathrm{R}) ) presents the results of a hypothesis test for the difference (mu_{X}-mu_{Y})
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The following output (from \(\mathrm{R}\) ) presents the results of a hypothesis test for the difference \(\mu_{X}-\mu_{Y}\) between two population means:
a. Is this a one-tailed or a two-tailed test?
b. What is the null hypothesis?
c. Can \(H_{0}\) be rejected at the \(5 \%\) level? How can you tell?
d. Use the value of \(t\) and the mean of the differences in the output to compute the standard deviation \(s_{D}\) of the differences.
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