Exhibit 20.2.A trading magazine wants to determine the number of hours stock brokers 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 . Refer to Exhibit 20.2.At the 1% significance level,the right-tail critical value is:
A)1.645
B)1.96
C)2.33
D)2.575

Question

Exhibit 20.2.A trading magazine wants to determine the number of hours stock brokers 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  . Refer to Exhibit 20.2.At the 1% significance level,the right-tail critical value is:
A)1.645 
B)1.96 
C)2.33 
D)2.575

Quizplus · Accepted Answer

The Wilcoxon Signed-Rank Test is a nonparametric test used to determine whether two related samples are drawn from populations having the same distribution. The test statistic for this problem is 11eaa4ae_7a39_6d5b_9180_094c4ec0dff2_TB2339_11. To determine the critical value for a right-tailed test at the 1% significance level with n = 18, we need to use a table for the Wilcoxon Signed-Rank Test. The critical value for n = 18 and a one-tailed test at the 1% level is 44, and the corresponding z-value is 2.575. Therefore, the correct answer is D, 2.575.