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Mann Whitney

The Wilcoxon Signed-Rank Test is a non-parametric statistical method used to compare two related samples when normality cannot be assumed, often serving as an alternative to the paired t-test. An example clinical trial involving 8 patients assessed the effectiveness of a pain relief medication using this test to evaluate differences in pain levels before and after treatment. The process of conducting the test can be completed in four steps.

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12 views20 pages

Mann Whitney

The Wilcoxon Signed-Rank Test is a non-parametric statistical method used to compare two related samples when normality cannot be assumed, often serving as an alternative to the paired t-test. An example clinical trial involving 8 patients assessed the effectiveness of a pain relief medication using this test to evaluate differences in pain levels before and after treatment. The process of conducting the test can be completed in four steps.

Uploaded by

leumerjoshterrora
Copyright
© © All Rights Reserved
We take content rights seriously. If you suspect this is your content, claim it here.
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Sample Problem #1

sample problem #2
wilcoxon signed-rank test
The Wilcoxon Signed-Rank Test is a non-
parametric statistical test used to compare two
related samples, matched samples, or repeated
measurements to assess whether their population
mean ranks differ. It is often used as an alternative
to the paired t-test when the data does not meet
the assumptions of normality.
wilcoxon signed-rank test
wilcoxon signed-rank test
wilcoxon signed-rank test
SAMPLE PROB
STEP 1 STEP 2
STEP 3
sample problem #2
In a clinical trial conducted to evaluate the effectiveness of a new
pain relief medication, 8 patients were given the medication and
rated their pain level on a scale of 1 to 10 both before and after
taking the drug. As each patient contribute a pair of datapoints of
a discrete numeric variable, the sample size is small and
normality cannot be assumed, the Wilcoxon signed rank test for
paired data is suitable to test the differences between the pairs.
This can be done by hand in four steps.
sample problem #2
Thank You

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