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b. If the interaction is statistically significant, conduct simple effects
analyses, and any necessary multiple comparisons tests by hand and
with SPSS or SAS.
8.2.
Three breeds of dogs (Factor
a
: German Shepherds, Chihuahuas, and
Poodles) were exclusively fed three types of dog food (Factor
b
: Krunchies,
Meaties, and Nibblets) during the course of a one month dog obedience
training seminar. At the end of the course each dog was rated on a 1
=
very
disobedient
to 10
=
very obedient
Likert-type scale. The data are as follows:
a
1
b
1
a
1
b
2
a
1
b
3
a
2
b
1
a
2
b
2
a
2
b
3
a
3
b
1
a
3
b
2
a
3
b
3
8
10
10
5
10
5
8
8
8
9
10
9
5
9
5
7
5
9
10
10
8
6
8
4
8
4
7
10
9
10
6
10
6
7
7
8
9
7
10
5
10
5
8
5
8
9
9
9
6
9
6
9
5
7
a. Conduct an ANOVA on these data by hand and with SPSS or SAS.
b. If the interaction is statistically significant, conduct simple effects
analyses, and any necessary multiple comparisons tests by hand and
with SPSS or SAS.
8.3.
Market researchers were interested in testing the effectiveness of two
new hand lotion products (
a
1
=
Softy and
a
2
=
Mushy) on adult women
from four geographical regions of the U.S. (
b
1
=
We s t ,
b
2
=
Midwest,
b
3
=
South, and
b
4
=
East). The dependent measure was lotion perceived
effectiveness with 1
=
not very effective
and 10
=
very effective
. The data are
as follows:
a
1
b
1
a
1
b
2
a
1
b
3
a
1
b
4
a
2
b
1
a
2
b
2
a
2
b
3
a
2
b
4
7
8
5
9
4
5
2
5
8
9
6
9
4
5
1
7
9
10
6
9
4
5
2
5
10
8
6
10
3
6
1
7
7
9
7
7
4
4
2
5
8
10
7
7
2
4
3
6
7
10
7
5
4
4
4
7
7
10
8
7
5
4
2
5
a.
Conduct an ANOVA on these data by hand and with SPSS or SAS.
b.
If the interaction is statistically significant, conduct simple effects
analyses, and any necessary multiple comparisons tests by hand and
with SPSS or SAS.
