Refer to the Mega-Stat/Excel Output for the Wilcoxon Rank Sum $\ge$

question 23

Multiple Choice

Refer to the Mega-Stat/Excel output for the Wilcoxon rank sum test given in the table below.
At a significance level of .05,which one of the following rejection point conditions is correct regarding the following null hypothesis? H₀: D₁ is shifted to the left of D₂

• A)Reject H₀ if T \(\ge\) 83
• B)Reject H₀ if T \(\le\) 127
• C)Reject H₀ if T \(\ge\) 131
• D)Reject H₀ if T \(\le\) 83
• E)Reject H₀ if T \(\le\)79

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Definitions:

Bonferroni Method

A statistical correction method used to address the problem of multiple comparisons, reducing the chances of attaining false-positive results.

Confidence Interval

A range of values, derived from the sample data, within which the true population parameter is expected to lie, at a given probability.

Degrees of Freedom

The number of independent values or quantities which can be assigned to a statistical distribution, often related to the number of independent observations in a data set minus any constraints.

F Statistic

A ratio derived from the analysis of variance (ANOVA) that compares the variance between group means to the variance within groups.