Which of the Following Statements Are True?
A) in Large-Sample $Z = \frac { S _ { + } - n ( n + 1 ) / 4 } { \sqrt { n ( n + 1 ) ( 2 n + 1 ) / 24 } }$

question 48

Multiple Choice

Which of the following statements are true?

• A) In large-sample problems, the Wilcoxon signed-rank test is never very much less efficient than the t test and may be much more efficient if the underlying distribution is far from normal.
• B) The Wilcoxon signed-rank test statistic for large-sample is \(Z = \frac { S _ { + } - n ( n + 1 ) / 4 } { \sqrt { n ( n + 1 ) ( 2 n + 1 ) / 24 } }\)
• Where n is the sample size and \(S _ { + }\)
• Is the sum of the ranks associated with the positive observations.
• C) When the sample size n > 20, the Wilcoxon signed-rank test statistic \(S _ { + }\)
• Has approximately a normal distribution with mean and variance given by \(n ( n + 1 ) / 4 \text { and } n ( n + 1 ) ( 2 n + 1 ) / 24\)
• , respectively
• D) All of the above statements are true.
• E) None of the above statements are true.

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Definitions:

Model Behavior

Exhibiting exemplary or desired behaviors that others, especially those looking up to the model, can imitate.

Opposite Sex

Refers to the gender other than one's own, especially in the context of attraction, relationships, or sociobiological discussions.

Cartoon Character

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