Nine Students Took the SAT Test

question 73

Essay

Nine students took the SAT test. Their scores are listed below. Later, they took a test preparation course and retook the SAT. Their new scores are listed below. Use the Wilcoxon signed rank test to test the claim that the test preparation had no effect on their scores. Use α = .05. $$\begin{array} { l c c c c c c c c c } \hline \text { Student } & 1 & 2 & 3 & 4 & 5 & 6 & 7 & 8 & 9 \\\hline \text { Before Score } &1000 & 850 & 890 & 830 & 900 & 810 & 820 & 1080 & 980 \\\text { After Score } & 1020 & 850 & 880 & 870 & 930 & 820 & 810 & 1120 & 1000 \\\hline\end{array}$$

---

Definitions:

Range Of Reports

The variety of documented accounts or statements covering different topics or areas of study.

Survey Duration

The length of time it takes to complete a survey, affecting both the participant's experience and the quality of data collected.

Effective Survey

A well-designed questionnaire that achieves its intended purpose of gathering relevant information from respondents.

Questionnaire

A set of written questions used for collecting information from respondents.