Write a conclusion about the effects of the different instructions, include the following: An explanation of the obtained value of the t-test. Provide a measure of explained variance, and an explanation of it. . Provide the effect size calculation, and expl
Write a conclusion about the effects of the different instructions, include the following: An explanation of the obtained value of the t-test. Provide a measure of explained variance, and an explanation of it. . Provide the effect size calculation, and expl
MATLAB: An Introduction with Applications
6th Edition
ISBN:9781119256830
Author:Amos Gilat
Publisher:Amos Gilat
Chapter1: Starting With Matlab
Section: Chapter Questions
Problem 1P
Related questions
Question
More info: sample variance S2=25.111
Write a conclusion about the effects of the different instructions, include the following:
An explanation of the obtained value of the t-test.
Provide a measure of explained variance, and an explanation of it. .
Provide the effect size calculation, and explain the size of the effect.
The 95% confidence interval and its explanation.
Was the homogeneity of variance assumption “violated?” How do you know?
![NEW FILE.
DATASET NAME DataSetl WINDOW=FRONT.
T-TEST GROUPS=group (1 2)
/MISSING=ANALYSIS
/VARIABLES=score
/CRITERIA=CI (.95).
T-Test
[DataSetl]
Group Statistics
Std. Error
Mean
difficulty
N.
Mean
Std. Deviation
Score
difficult
10
15.8000
8.63842
2.73171
2.00
10
9.0000
5.01110
1.58465
Independent Samples Test
Levene's Test for Equality of
Variances
t-test for Equality of Means
95% Confidence Interval of the
Difference
Mean
Difference
Std. Error
Difference
Sig.
df
Sig. (2-tailed)
Lower
Upper
Equal variances
7.401
.014
2.153
18
045
6.80000
3.15806
.16517
13.43483
Score
assumed
2.153
14.441
049
6.80000
3.15806
.04599
13.55401
Equal variances not
assumed
Breces cor is ready
Unicode ON H: 1](/v2/_next/image?url=https%3A%2F%2Fcontent.bartleby.com%2Fqna-images%2Fquestion%2F9c72e2d2-b0c3-42ae-9b81-186a94a5ff6a%2F7bd07d8a-e65f-4bbb-b63b-a4abd53470ba%2Fj88dctq_processed.jpeg&w=3840&q=75)
Transcribed Image Text:NEW FILE.
DATASET NAME DataSetl WINDOW=FRONT.
T-TEST GROUPS=group (1 2)
/MISSING=ANALYSIS
/VARIABLES=score
/CRITERIA=CI (.95).
T-Test
[DataSetl]
Group Statistics
Std. Error
Mean
difficulty
N.
Mean
Std. Deviation
Score
difficult
10
15.8000
8.63842
2.73171
2.00
10
9.0000
5.01110
1.58465
Independent Samples Test
Levene's Test for Equality of
Variances
t-test for Equality of Means
95% Confidence Interval of the
Difference
Mean
Difference
Std. Error
Difference
Sig.
df
Sig. (2-tailed)
Lower
Upper
Equal variances
7.401
.014
2.153
18
045
6.80000
3.15806
.16517
13.43483
Score
assumed
2.153
14.441
049
6.80000
3.15806
.04599
13.55401
Equal variances not
assumed
Breces cor is ready
Unicode ON H: 1
![A psychologist wants to determine the effect of instructions on
the time required to solve a mechanical puzzle. Each of 20
volunteers is given the same mechanical puzzle to be solved as
rapidly as possible. Before the task, the subjects are randomly
assigned in equal numbers to receive two different sets of
instructions. One group is told that the task is difficult, the other
group is told the task is easy. The score for each subject reflects
the time in minutes required to solve the puzzle. Test the
research using a two-tailed test and a = .05.
Difficult instruction
Easy instruction
5
13
20
6.
7
6.
23
5
30
3
24
9
10
8
20
20
9.
12
12](/v2/_next/image?url=https%3A%2F%2Fcontent.bartleby.com%2Fqna-images%2Fquestion%2F9c72e2d2-b0c3-42ae-9b81-186a94a5ff6a%2F7bd07d8a-e65f-4bbb-b63b-a4abd53470ba%2Fwq22pzi_processed.jpeg&w=3840&q=75)
Transcribed Image Text:A psychologist wants to determine the effect of instructions on
the time required to solve a mechanical puzzle. Each of 20
volunteers is given the same mechanical puzzle to be solved as
rapidly as possible. Before the task, the subjects are randomly
assigned in equal numbers to receive two different sets of
instructions. One group is told that the task is difficult, the other
group is told the task is easy. The score for each subject reflects
the time in minutes required to solve the puzzle. Test the
research using a two-tailed test and a = .05.
Difficult instruction
Easy instruction
5
13
20
6.
7
6.
23
5
30
3
24
9
10
8
20
20
9.
12
12
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