3. A research team wants to investigate the usefulness of relaxation training forreducing levels of anxiety in individuals experiencing stress. They identify 30people at random from a group of 100 who have "high stress" jobs. The 30 peopleare divided into two groups. One group acts as the control group - they receive notraining. The second group of 15 receive the relaxation training. The subjects ineach group are then given an anxiety inventory. The summarized results appearbelow where higher scores indicate greater anxiety.ControlRelaxationX 30X = 26S= 6.20S=6.63n = 15n = 154. A colleague of the investigators is problem 3 repeats the experiment but matchesthe samples on the dimensions of sex and job type. the raw data appear below.Evaluate her experiment using the criteria of p<.05. Assume it is a two tailedtest.Pairs:12 34 5 6 7 8 9 1011121314 15Contr: 38 40 35 36 35 32 31 30 28 26 24 21 18 34 22Relax:35 32 30 34 30 32 28 27 22 2218 17 17 25 21

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Description: 3. A research team wants to investigate the usefulness of relaxation training forreducing levels of anxiety in individuals experiencing stress. They identify 30people at random from a group of 100 who have "high stress" jobs. The 30 peopleare divide

4) Given data: Pairs 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 Control 38 40 35 36 35 32 31 30 28 26…

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4. A colleague of the investigators is problem 3 repeats the experiment but matches the samples on the dimensions of sex and job type. the raw data appear below. Evaluate her experiment using the criteria of p<.05. Assume it is a two tailed test. Pairs: 1 3 4 5 6 7 8 9. 10 11 12 13 14 15 Contr: 38 40 35 36 35 32 31 30 28 26 24 18 34 22 Relax: 35 32 30 34 30 32 28 27 22 22 18 17 17 25 21 21

4. A colleague of the investigators is problem 3 repeats the experiment but matches the samples on the dimensions of sex and job type. the raw data appear below. Evaluate her experiment using the criteria of p<.05. Assume it is a two tailed test. Pairs: 1 3 4 5 6 7 8 9. 10 11 12 13 14 15 Contr: 38 40 35 36 35 32 31 30 28 26 24 18 34 22 Relax: 35 32 30 34 30 32 28 27 22 22 18 17 17 25 21 21

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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Concept explainers

2-Proportion Test

In a 2-proportion test, two separate proportions are measured at the same time, and their similarity is evaluated. It is also known as a 2-proportion z-test, and a comparison of two different proportions is done in this method.

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Question

3. A research team wants to investigate the usefulness of relaxation training for
reducing levels of anxiety in individuals experiencing stress. They identify 30
people at random from a group of 100 who have "high stress" jobs. The 30 people
are divided into two groups. One group acts as the control group - they receive no
training. The second group of 15 receive the relaxation training. The subjects in
each group are then given an anxiety inventory. The summarized results appear
below where higher scores indicate greater anxiety.
Control
Relaxation
X 30
X = 26
S= 6.20
S=6.63
n = 15
n = 15
4. A colleague of the investigators is problem 3 repeats the experiment but matches
the samples on the dimensions of sex and job type. the raw data appear below.
Evaluate her experiment using the criteria of p<.05. Assume it is a two tailed
test.
Pairs:
1
2 3
4 5 6 7 8 9 10
11
12
13
14 15
Contr: 38 40 35 36 35 32 31 30 28 26 24 21 18 34 22
Relax:
35 32 30 34 30 32 28 27 22 22
18 17 17 25 21

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