A trading magazine wants to determine the number of hours stockbrokers work each week.In particular,the trading magazine wants to determine if the median numbers worked per week differs from 100 hours.The magazine samples 18 traders.For the Wilcoxon signed-rank test,the value of the test statistic is T = T⁺ = 153.Inasmuch as the sample size is more than 10,T can be assumed normally distributed with mean and standard deviation ___________,respectively. A) 85.50,527.25 B) 22.96,527.25 C) 22.96,85.50 D) 85.50,22.96

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Quizplus · Accepted Answer

For the Wilcoxon signed-rank test, the mean is calculated as n(n+1)/4 and the standard deviation as sqrt(n(n+1)(2n+1)/24). For n=18, the mean is 85.50 and the standard deviation is 22.96.

A Trading Magazine Wants to Determine the Number of Hours