Perform the Indicated Wilcoxon Test $$\alpha = 0.05 \text {. }$$

question 50

Essay

Perform the indicated Wilcoxon test. Be sure to do the following: Identify the claim mathematically and state the null
and alternative hypotheses. Determine the critical value and find the test statistic. Decide whether to reject or fail to
reject the null hypothesis and interpret the decision in the context of the original claim.
-A random sample of nine students took the SAT test. and later on retook the test after taking a test preparation
course. Their scores are listed below. Use the Wilcoxon signed-rank test to test the claim that the test
preparation has no effect on their scores. Use $$\alpha = 0.05 \text {. }$$ $$\begin{array} { l c c c c c c c c c } \hline \text { Student } & 1 & 2 & 3 & 4 & 5 & 6 & 7 & 8 & 9 \\\hline \text { Before Score } &820 & 1180 & 840 & 1080 & 850 & 1010 & 1160 & 940 & 980 \\\text { After Score } & 840 & 1180 & 830 & 1120 & 880 & 1020 & 1150 & 980 & 1000 \\\hline\end{array}$$

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Definitions:

Honest Feedback

Genuine, truthful, and straightforward reactions or responses provided to others.

Aggressive Temperament

A behavioral disposition characterized by the tendency to be forward, assertive, and often confrontational in interactions and responses.

Detrimental

Causing harm or damage, often in a subtle or gradual way.

Tone

The general character or attitude of a place, piece of writing, situation, etc., often referring to the way something is said rather than what is actually said.