# How are independent samples t-tests and One-way ANOVAs similar

August 30, 2017

Question
1. How are independent samples t-tests and One-way ANOVAs similar? How do the two tests differ? (Points : 12)

Question 2.2. What is the F-ratio? That is, what makes up the top and bottom portions of the F-ratio? (Points : 10)

Question 3.3.
A social psychologist conducted a study examining the effectiveness of two persuasion techniques. She found the following information in her ANOVA table:

SS between = 45.55
SS within = 30.22
SS total = 75.77

Using eta squared, calculate the effect size for her study? What does this mean? (Points : 10)

Question 4.4.
A researcher is interested in how caffeine affects stress. One group gets no caffeine and the other gets 3 cups of coffee.

Complete the ANOVA table
ANOVA Summary Table
Source
SS
df
MS
F
A-group
150
1

S/A (error)
25
18

Total
175
19

Fill-in the missing A-group MS value:
(Points : 5)

Question 5.5.
A researcher is interested in how caffeine affects stress. One group gets no caffeine and the other gets 3 cups of coffee.

Complete the ANOVA table
ANOVA Summary Table
Source
SS
df
MS
F
A-group
150
1

S/A (error)
25
18

Total
175
19

Fill-in the missing S/A MS value:
(Points : 5)

Question 6.6.
A researcher is interested in how caffeine affects stress. One group gets no caffeine and the other gets 3 cups of coffee.

Complete the ANOVA table
ANOVA Summary Table
Source
SS
df
MS
F
A-group
150
1

S/A (error)
25
18

Total
175
19

Fill-in the missing F value:
(Points : 5)

Question 7.7.
A researcher is interested in how caffeine affects stress. One group gets no caffeine and the other gets 3 cups of coffee.

Complete the ANOVA table
ANOVA Summary Table
Source
SS
df
MS
F
A-group
150
1

S/A (error)
25
18

Total
175
19

Find F-critical.
(Points : 3)

Question 8.8.
A researcher is interested in how caffeine affects stress. One group gets no caffeine and the other gets 3 cups of coffee.

Complete the ANOVA table
ANOVA Summary Table
Source
SS
df
MS
F
A-group
150
1

S/A (error)
25
18

Total
175
19

Are the two groups significantly different?
(Points : 2)

Question 9.9.
A researcher is interested in how caffeine affects stress. One group gets no caffeine and the other gets 3 cups of coffee.

Complete the ANOVA table
ANOVA Summary Table
Source
SS
df
MS
F
A-group
150
1

S/A (error)
25
18

Total
175
19

Interpret the results (remember to address the research question)
(Points : 5)

Question 10.10.
A researcher is interested in how caffeine affects stress. One group gets no caffeine and the other gets 3 cups of coffee.

Complete the ANOVA table
ANOVA Summary Table
Source
SS
df
MS
F
A-group
150
1

S/A (error)
25
18

Total
175
19

Write the results statiscally
(Points : 5)

Question 11.11. A clinical psychologist is examining the effects of different types of therapy on reducing schizophrenic symptoms. Patients are assigned to no therapy, psychoanalysis, behavioral therapy, or cognitive therapy. The ANOVA is significant.

What should the psychologist do next? (Points : 10)

Question 12.12.
Dr. Iforgot cannot seem to remember how to calculate an ANOVA. Complete the missing information in the ANOVA summary table below.

ANOVA Summary Table
Source
SS
df
MS
F
Effect A
5.04
1

Effect B
7.04
1

A X B
7.05
1

Within (S/AB)
16.83
20
.84

Total
35.96
23

Fill-in the missing Effect A MS value:
(Points : 3)

Question 13.13.
Dr. Iforgot cannot seem to remember how to calculate an ANOVA. Complete the missing information in the ANOVA summary table below.

ANOVA Summary Table
Source
SS
df
MS
F
Effect A
5.04
1

Effect B
7.04
1

A X B
7.05
1

Within (S/AB)
16.83
20
.84

Total
35.96
23

Fill-in the missing Effect A F value:
(Points : 3)

Question 14.14.
Dr. Iforgot cannot seem to remember how to calculate an ANOVA. Complete the missing information in the ANOVA summary table below.

ANOVA Summary Table
Source
SS
df
MS
F
Effect A
5.04
1

Effect B
7.04
1

A X B
7.05
1

Within (S/AB)
16.83
20
.84

Total
35.96
23

Fill-in the missing Effect B MS value:
(Points : 3)

Question 15.15.
Dr. Iforgot cannot seem to remember how to calculate an ANOVA. Complete the missing information in the ANOVA summary table below.

ANOVA Summary Table
Source
SS
df
MS
F
Effect A
5.04
1

Effect B
7.04
1

A X B
7.05
1

Within (S/AB)
16.83
20
.84

Total
35.96
23

Fill-in the missing Effect B F value:
(Points : 3)

Question 16.16.
Dr. Iforgot cannot seem to remember how to calculate an ANOVA. Complete the missing information in the ANOVA summary table below.

ANOVA Summary Table
Source
SS
df
MS
F
Effect A
5.04
1

Effect B
7.04
1

A X B
7.05
1

Within (S/AB)
16.83
20
.84

Total
35.96
23

Fill-in the missing A X B MS value:
(Points : 3)

Question 17.17.
Dr. Iforgot cannot seem to remember how to calculate an ANOVA. Complete the missing information in the ANOVA summary table below.

ANOVA Summary Table
Source
SS
df
MS
F
Effect A
5.04
1

Effect B
7.04
1

A X B
7.05
1

Within (S/AB)
16.83
20
.84

Total
35.96
23

Fill-in the missing A X B F value:
(Points : 3)

Question 18.18.
Dr. Iforgot cannot seem to remember how to calculate an ANOVA. Complete the missing information in the ANOVA summary table below and answer the question that follows.

ANOVA Summary Table
Source
SS
df
MS
F
Effect A
5.04
1

Effect B
7.04
1

A X B
7.05
1

Within (S/AB)
16.83
20
.84

Total
35.96
23

What type of ANOVA? (Points : 5)

Question 19.19.
Dr. Iforgot cannot seem to remember how to calculate an ANOVA. Complete the missing information in the ANOVA summary table below and answer the question that follows.

ANOVA Summary Table
Source
SS
df
MS
F
Effect A
5.04
1

Effect B
7.04
1

A X B
7.05
1

Within (S/AB)
16.83
20
.84

Total
35.96
23

Which effects are significant?
(Points : 5)

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