Participants Group 1 Group 2 Group 3 Group 4 1 8 3 8 7 2 7 6 5 4 3 9 7 6 3 4 8 4
ID: 3060372 • Letter: P
Question
Participants
Group 1
Group 2
Group 3
Group 4
1
8
3
8
7
2
7
6
5
4
3
9
7
6
3
4
8
4
4
7
5
6
3
6
8
6
10
5
4
3
7
7
3
5
6
8
9
6
3
3
9
10
5
6
7
10
7
7
3
5
What is the value for Eta squared based on your resulting data?
What is your value for Omega Squared?
Bonus (5 Points): Why is a post Hoc test required in research and when is it applied?
Participants
Group 1
Group 2
Group 3
Group 4
1
8
3
8
7
2
7
6
5
4
3
9
7
6
3
4
8
4
4
7
5
6
3
6
8
6
10
5
4
3
7
7
3
5
6
8
9
6
3
3
9
10
5
6
7
10
7
7
3
5
Explanation / Answer
Result:
What is the value for Eta squared based on your resulting data?
Eta squared = SSB/SST = 69.875/ 165.775
=0.421505
Tests of Between-Subjects Effects
Dependent Variable: data
Source
Type III Sum of Squares
df
Mean Square
F
Sig.
Partial Eta Squared
Corrected Model
69.875a
3
23.292
8.743
.000
.422
Intercept
1357.225
1
1357.225
509.490
.000
.934
Group
69.875
3
23.292
8.743
.000
.422
Error
95.900
36
2.664
Total
1523.000
40
Corrected Total
165.775
39
a. R Squared = .422 (Adjusted R Squared = .373)
What is your value for Omega Squared?
Omega Squared =SSB-dfB*MSW/SST
= ( 69.875-3*2.664)/ 165.775
=0.373295
Why is a post Hoc test required in research and when is it applied?
ANOVA reports that if the means are different from each other or not. Once we determined that differences exist among the means, post hoc tests are required. Post hoc tests used for to determine which pairs of means are differ.
Tests of Between-Subjects Effects
Dependent Variable: data
Source
Type III Sum of Squares
df
Mean Square
F
Sig.
Partial Eta Squared
Corrected Model
69.875a
3
23.292
8.743
.000
.422
Intercept
1357.225
1
1357.225
509.490
.000
.934
Group
69.875
3
23.292
8.743
.000
.422
Error
95.900
36
2.664
Total
1523.000
40
Corrected Total
165.775
39
a. R Squared = .422 (Adjusted R Squared = .373)