Using the Following Data, the Wilcoxon Signed-Rank Hypothesis Test Is

question 21

Multiple Choice

Using the following data, the Wilcoxon signed-rank hypothesis test is used to test the hypothesis that there is no difference between the before and after populations. What are the sum of the ranks?

• A) 4 and 6
• B) 5
• C) 17
• D) 6 and -11

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Definitions:

P-Value

The p-value is a measure in statistical hypothesis testing that indicates the probability of obtaining test results at least as extreme as the ones observed, assuming the null hypothesis is true.

Level of Significance

The threshold under which a statistical result is considered statistically significant, traditionally set at 0.05 or 5%.

Degrees of Freedom

The number of independent values or quantities which can be assigned to a statistical distribution or parameter estimate, impacting the shape and scale of the distribution.

Rule of 5

An empirical rule suggesting that a sample of size five is often sufficient for capturing the median of a population, specifically under conditions reflected in the five-number summary.