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Question 21 4 pts A set of progressive relaxation exercises was shown on videotape to an Experimental Group (EG) of 38 subjects, while set of neutral videotape was shown to a Control Group (CG) of 23 patients who were also on chronic hemodialysis. The results of a psychiatric questionnaire are presented below: Pretest Posttest Mean sd n Mean sd n Experimental 37.51 10.66 38 33.42 10.18 38 Control 36.42 8.59 23 39.71 9.16 23 We want to perform a statistical test to compare pretest scores of EG and CG. What is the correct test statistics to compare variance of EG and CG? F-test Question 25 8 pts From question 21, select all correct conclusion(s): Reject null (HO) hypothesis with $\alpha$ = 0.05 Reject null (HO) and alternate (H1) hypotheses with $\alpha$ = 0.05 ?Fail to reject null (HO) hypothesis with $\alpha$ = 0.05 Fail to reject null (HO) and alternate (H1) hypotheses with $\alpha$ = 0.05 Fail to reject null (HO) hypothesis with $\alpha$ = 0.1 None of the above conclusions are correct.

          Question 21
4 pts
A set of progressive relaxation exercises was shown on videotape to
an Experimental Group (EG) of 38 subjects, while set of neutral
videotape was shown to a Control Group (CG) of 23 patients who
were also on chronic hemodialysis. The results of a psychiatric
questionnaire are presented below:
Pretest
Posttest
Mean sd
n
Mean sd
n
Experimental 37.51 10.66 38
33.42 10.18 38
Control 36.42 8.59 23
39.71 9.16 23
We want to perform a statistical test to compare pretest scores of EG
and CG. What is the correct test statistics to compare variance of EG
and CG?
F-test
Question 25
8 pts
From question 21, select all correct conclusion(s):
Reject null (HO) hypothesis with $\alpha$ = 0.05
Reject null (HO) and alternate (H1) hypotheses with $\alpha$ = 0.05
?Fail to reject null (HO) hypothesis with $\alpha$ = 0.05
Fail to reject null (HO) and alternate (H1) hypotheses with $\alpha$ = 0.05
Fail to reject null (HO) hypothesis with $\alpha$ = 0.1
None of the above conclusions are correct.

Show more…

Question 21
4 pts
A set of progressive relaxation exercises was shown on videotape to
an Experimental Group (EG) of 38 subjects, while set of neutral
videotape was shown to a Control Group (CG) of 23 patients who
were also on chronic hemodialysis. The results of a psychiatric
questionnaire are presented below:
Pretest
Posttest
Mean sd
n
Mean sd
n
Experimental 37.51 10.66 38
33.42 10.18 38
Control 36.42 8.59 23
39.71 9.16 23
We want to perform a statistical test to compare pretest scores of EG
and CG. What is the correct test statistics to compare variance of EG
and CG?
F-test
Question 25
8 pts
From question 21, select all correct conclusion(s):
Reject null (HO) hypothesis with α = 0.05
Reject null (HO) and alternate (H1) hypotheses with α = 0.05
?Fail to reject null (HO) hypothesis with α = 0.05
Fail to reject null (HO) and alternate (H1) hypotheses with α = 0.05
Fail to reject null (HO) hypothesis with α = 0.1
None of the above conclusions are correct.

Added by Celia C.

Elementary Statistics a Step by Step Approach

Allan G. Bluman 9th Edition

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Solved by Expert Rachel Gore

10/03/2023

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The F-test is used to compare the variances of two samples. Show more…

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Question 21 A set of progressive relaxation exercises was shown on videotape to an Experimental Group (EG) of 38 subjects, while a set of neutral videotape was shown to a Control Group (CG) of 23 patients who were also on chronic hemodialysis. The results of a psychiatric questionnaire are presented below: We want to perform a statistical test to compare pretest scores of EG and CG. What is the correct test statistic to compare the variance of EG and CG? F-test T-test Z-test Question 25 From question 21, select all correct conclusion(s): Reject null (H0) hypothesis with α=0.05 Reject null (H0) and alternate (H1) hypotheses with α=0.05 Fail to reject null (H0) hypothesis with α=0.05 Fail to reject null (H0) and alternate (H1) hypotheses with α=0.05 Fail to reject null (H0) hypothesis with α=0.1 None of the above conclusions are correct. Question 21 A set of progressive relaxation exercises was shown on videotape to an Experimental Group (EG) of 38 subjects, while a set of neutral videotape was shown to a Control Group (CG) of 23 patients who were also on chronic hemodialysis. The results of a psychiatric questionnaire are presented below: Pretest Mean sd n Experimental 37.51 10.66 38 Control 36.42 8.59 23 Posttest Mean sd n 33.42 10.18 38 39.71 9.16 23 We want to perform a statistical test to compare pretest scores of EG and CG. What is the correct test statistic to compare the variance of EG and CG? F-test Question 25 From question 21, select all correct conclusion(s): Reject null (H0) hypothesis with α=0.05 Reject null (H0) and alternate (H1) hypotheses with α=0.05 Fail to reject null (H0) hypothesis with α=0.05 Fail to reject null (H0) and alternate (H1) hypotheses with α=0.05 Fail to reject null (H0) hypothesis with α=0.1 None of the above conclusions are correct.

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