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The accompanying data fle shows matched-pairs observations for a before-and-after experiment. Assume that the sampie differences are normally distributed. (You may find it useful to reference the appropriate table: ztable or $t$ table) Bpicture Click here for the Excel Data Flle Hint The differences are calculated as Xbefore - Xafter. a. Construct the competing hypotheses to determine if the experiment increases the value of the observations. $H_{0}:μ_{D}=θ;H_{A}:μ_{D}=0H_{0}:μ_{D}=θ;H_{A}:μ_{D}<θH_{0}:μ_{O}≤θ;H_{A}:μ_{D}>θ $ b. Calculate the value of the test statistic. (Negative value should be indicated by a minus sign. Round final answer to 2 decimal places.)
c. Find the p-value? $p$-value $<0.01$ $0.01≤p-value<0.0250.025≤p-value<0.050.05≤p-value<0.10p-value≥0.10 $ d. What is the conclusion to the hypothesis test? \begin{tabular}{|l} \hline We \\ the experiment increases the value of the observations. \end{tabular}

Here we have, N = 8

Standard deviation

(a) Hypothesis

This is a left tailed...

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