You Are Performing the Wilcoxon Rank-Sum Test

question 85

Multiple Choice

You are performing the Wilcoxon rank-sum test. The 13^th through 15^th values in an ordered array of pooled sample data all equal $180 (while the 12^th value is less and the 16^th value is more) . The appropriate ranks for the three $180 values are:

• A) 13, 14, 15
• B) 14, 14, 14
• C) 12.5, 13, 14.5
• D) 12.5, 13, 15
• E) 13, 13, 13

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Definitions:

Normality Requirement

The assumption that the data or residuals in certain statistical models follow a normal distribution.

Parametric Test

A type of statistical test that assumes the underlying data has a specific distribution, often based on parameters like mean and standard deviation.

Wilcoxon Signed Rank Test

The Wilcoxon Signed Rank Test is a non-parametric statistical test for comparing two matched or paired samples to assess whether their population mean ranks differ.

Test Statistic

A calculated value from data that is used to test a hypothesis in the context of statistical analysis, helping determine the probability of observing the given data under the null hypothesis.