Let Find the Set $A \cup ( B \cup C )$

question 49

Multiple Choice

Let $$\begin{array} { l } A = \{ \text { June, Justine, Solly, Polly } \} \\B = \{ \text { Justine, Polly, Jelly } \} \\C = \{ \text { Ruth, Justine, Polly } \}\end{array}$$
Find the set $A \cup ( B \cup C )$ .

• A) \(\{ \text { June, Justine, Solly, Polly, Jelly, Ruth\} }\)
• B) \(\text { \{June, Justine, Solly, Polly, Ruth\} }\)
• C) \(\{ \text { Justine, Polly } \}\)
• D) \(\text { \{Justine, Solly, Polly, Jelly, Ruth\} }\)
• E) \(\varnothing\)

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Definitions:

Mann-Whitney Test

A nonparametric test used to assess whether there is a significant difference between two independent samples, an alternative to the t-test when certain assumptions are not met.

Sign Test

A non-parametric test used to determine if there is a significant difference between the median of two dependent samples.

Two-sample T-test

A statistical method to determine if there is a significant difference between the means of two groups, which may have different variances.

Wilcoxon Signed Rank

The Wilcoxon Signed Rank test is a nonparametric statistical test used to compare two related samples to assess whether their population mean ranks differ.