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Question #4 For students with last names beginning with P-T: Callahan (2009) demonstrated that tai chi can significantly reduce symptoms for individuals with arthritis. Participants were 18 years old or older with doctor-diagnosed arthritis. Self-reports of pain and stiffness were measured at the beginning of an eight-week tai chỉ course and again at the end. Suppose that the data produced an average decrease in pain and stiffness of Mp 8.5 points with a standard deviation of 21.5 for a sample of n= 40 participants. 1. Use a two-tailed test with a = .05 to determine whether the tai chi had a significant effect on pain and stiffness. 2. Compute Cohen's d to measure the size of the treatment effect.

Question #4 For students with last names beginning with P-T: Callahan (2009) demonstrated that tai chi can significantly reduce symptoms for individuals with arthritis. Participants were 18 years old or older with doctor-diagnosed arthritis. Self-reports of pain and stiffness were measured at the beginning of an eight-week tai chỉ course and again at the end. Suppose that the data produced an average decrease in pain and stiffness of Mp 8.5 points with a standard deviation of 21.5 for a sample of n= 40 participants. 1. Use a two-tailed test with a = .05 to determine whether the tai chi had a significant effect on pain and stiffness. 2. Compute Cohen's d to measure the size of the treatment effect.

Glencoe Algebra 1, Student Edition, 9780079039897, 0079039898, 2018
Glencoe Algebra 1, Student Edition, 9780079039897, 0079039898, 2018
18th Edition
ISBN:9780079039897
Author:Carter
Publisher:Carter
Chapter10: Statistics
Section10.4: Distributions Of Data
Problem 19PFA
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ompute the 80% confidence interval for the mean change in attention span for the population. Question #4 For students with last names beginning with P-T: Callahan (2009) demonstrated that tai chi can significantly reduce symptoms for individuals with arthritis. Participants were 18 years old or older with doctor-diagnosed arthritis. Self-reports of pain and stiffness were measured at the beginning of an eight-week tai chi course and again at the end. Suppose that the data produced an average decrease in pain and stiffness of Mp = 8.5 points with a standard deviation of 21.5 for a sample of n = 40 participants. 1. Use a two-tailed test with a = .05 to determine whether the tai chi had a significant effect on pain and stiffness. 2. Compute Cohen's d to measure the size of the treatment effect.
Transcribed Image Text:ompute the 80% confidence interval for the mean change in attention span for the population. Question #4 For students with last names beginning with P-T: Callahan (2009) demonstrated that tai chi can significantly reduce symptoms for individuals with arthritis. Participants were 18 years old or older with doctor-diagnosed arthritis. Self-reports of pain and stiffness were measured at the beginning of an eight-week tai chi course and again at the end. Suppose that the data produced an average decrease in pain and stiffness of Mp = 8.5 points with a standard deviation of 21.5 for a sample of n = 40 participants. 1. Use a two-tailed test with a = .05 to determine whether the tai chi had a significant effect on pain and stiffness. 2. Compute Cohen's d to measure the size of the treatment effect.
Expert Solution
Step 1

1. Null and alternate hypothesis is given by-

H0:μ=0Ha:μ≠0Level of significance=0.05

Test of statistic is given by-

Z=x¯-μσn

Given

MD=8.5σ=21.5n=40

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