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Perform non-parametric hypothesis tests. For each hypothesis test, make sure to report on and label the following steps in your work: Identify the null hypothesis,
Perform non-parametric hypothesis tests. For each hypothesis test, make sure to report on and label the following steps in your work:
- Identify the null hypothesis, Ho, and the alternative hypothesis, Ha.
- Determine whether the hypothesis test is left-tailed, right-tailed, or two-tailed.
- Find the critical value(s) and identify the rejection region(s).
- Find the appropriate standardized test statistic. If convenient, use technology.
- Decide whether to reject or fail to reject the null hypothesis.
- 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 = 0.05.
Student | 1 | 2 | 3 | 4 | 5 | 6 | 7 | 8 | 9 |
Before | 820 | 1180 | 840 | 1080 | 850 | 1010 | 1160 | 940 | 980 |
After | 840 | 1180 | 830 | 1120 | 880 | 1020 | 1150 | 980 | 1000 |
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