The median length of stay for substance-abuse outpatient treatment completers in 2004 was 107 days for those referred by the criminal justice system. The following data represent the length of stays for a randomsample of substance-abuse outpatient treatment completers in 2004 who were referred by an employer. Using the Wilcoxon signed-ranks test at the a= 0.10 level of significance, does the median length of stay seemdifferent for employer referrals than for those referred by the criminal justice system?808500112102YesNo95 107 89 100 Q107 1099394Using the Wilcoxon signed-ranks test at the a= 0.10 level of significance, does the median length of stay seem different for males and females?C

The data is given we need to perform Wilcoxon signed ranks test at alpha=0.10.

Answered: The median length of stay for…

MATLAB: An Introduction with Applications

6th Edition

ISBN:9781119256830

Author:Amos Gilat

Publisher:Amos Gilat

Chapter1: Starting With Matlab

Section: Chapter Questions

Problem 1P

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An ANOVA is used to compare the mean GPA of the following groups of students.
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A researcher is interested in exploring the relationship between calcium intake and weight loss. Two different groups, each with 2626 dieters, are chosen for the study. Group A is required to follow a specific diet and exercise regimen, and also take a 500-mg supplement of calcium each day. Group B is required to follow the same diet and exercise regimen, but with no supplemental calcium. After six months on the program, the members of Group A had lost a mean of 10.4 pounds with a standard deviation of 2.6 pounds. The members of Group B had lost a mean of 11.7pounds with a standard deviation of 2.8 pounds during the same time period. Assume that the population variances are not the same. Construct a 99% confidence interval to estimate the true difference between the mean amounts of weight lost by dieters who supplement with calcium and those who do not. Let Population 1 be the amount of weight lost by Group A, who took a 500-mg supplement of calcium each day, and let Population 2 be…
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