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Q 1 (a). What is the difference between a randomized ANOVA and a repeated measures ANOVA? What does the term one-way mean with respect to an ANOVA? Q...

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Q 1 (a).

What is the difference between a randomized ANOVA and a repeated measures ANOVA? What does the term one-way mean with respect to an ANOVA?

Q 1 (b). If a researcher decides to use multiple comparisons in a study with three conditions, what is the probability of a Type I error across these comparisons? Use the Bonferroni adjustment to determine the suggested alpha level.

Q 1 (C). When should post hoc comparisons be performed?

Q 1 (d) Why is a repeated measures ANOVA statistically more powerful than a randomized ANOVA?

Q 1 (e). In a study of the effects of stress on illness, a researcher tallied the number of colds people contracted during a 6-month period as a function of the amount of stress they reported during that same time period. There were three stress levels: minimal, moderate, and high stress. The sums of squares appear in the following ANOVA summary table. The mean for each condition and the number of subjects per condition are also noted.

Source

df

SS

MS

F

Between groups

22.167

Within groups

14.750

Total

36.917

Stress Level

Mean

N

Minimal

3

4

Moderate

4

4

High

6

4

a.Complete the ANOVA summary table.

b.Is Fobt significant at α = .05; at α = .01?

c.Perform post hoc comparisons if necessary.

d.What conclusions can be drawn from the F-ratio and the post hoc comparisons?

e.What is the effect size, and what does this mean?

f.Graph the means.

Question 1 (f). A researcher conducted an experiment on the effects of a new “drug” on depression. The researcher had a control group that received nothing, a placebo group, and an experimental group that received the “drug.” A depression inventory that provided a measure of depression on a 50-point scale was used (50 indicates that an individual is very high on the depression variable). The ANOVA summary table appears next, along with the mean depression score for each condition.

Source

df

SS

MS

F

Between groups

1,202.313

Within groups

2,118.00

Total

3,320.313

“Drug” Condition

Mean

n

Control

36.26

15

Placebo

33.33

15

“Drug”

24.13

15

a.Complete the ANOVA summary table.

b.Is Fobt significant at α = .05; at α = .01?

c.Perform post hoc comparisons if necessary.

d.What conclusions can be drawn from the F-ratio and the post hoc comparisons?

e.What is the effect size, and what does this mean?

f.Graph the means.

Question 1 (g). A researcher has been hired by a pizzeria to determine which type of crust customers prefer. The restaurant offers three types of crust: hand-tossed, thick, and thin. Following are the mean number of 1-inch pieces of pizza eaten for each condition from 10 subjects who had the opportunity to eat as many pieces with each type of crust as they desired. The ANOVA summary table also follows.

Source

df

SS

MS

F

Subject

2.75

Between

180.05

Error

21.65

Total

204.45

Crust Type

Mean

n

Hand-tossed

2.73

10

Thick

4.20

10

Thin

8.50

10

a.Complete the ANOVA summary table.

b.Is Fobt significant at α = .05; at α = .01?

c.Perform post hoc comparisons if necessary.

d.What conclusions can be drawn from the F-ratio and the post hoc comparisons?

e.What is the effect size, and what does this mean?

f.Graph the means.

Question 2. What is an F-ratio? Define all the technical terms in your answer.

Quesation 3. What is error variance and how is it calculated?

Question 4.Why would anyone ever want more than two (2) levels of an independent variable?

Question 5.If you were doing a study to see if a treatment causes a significant effect, what would it mean if within groups variance was higher than between groups variance? If between groups variance was higher than within groups variance? Explain your answer

  1. What is the purpose of a post-hoc test with analysis of variance?
  2. What is probabilistic equivalence? Why is it important?

Support your paper with a minimum of 5 resources. In addition to these specified resources, other appropriate scholarly resources, including older articles, may be included.

Length: 5-7 pages not including title and reference pages
References: Minimum of 5 scholarly resources.

Assignment 3.docx

Q 1 (a).
What is the difference between a randomized ANOVA and a repeated measures
ANOVA? What does the term one-way mean with respect to an ANOVA? Q 1 (b). If a researcher decides to use multiple comparisons in a study with three
conditions, what is the probability of a Type I error across these comparisons?
Use the Bonferroni adjustment to determine the suggested alpha level.
Q 1 (C). When should post hoc comparisons be performed?
Q 1 (d) Why is a repeated measures ANOVA statistically more powerful than a
randomized ANOVA? Q 1 (e). In a study of the effects of stress on illness, a researcher tallied
the number of colds people contracted during a 6-month period as a
function of the amount of stress they reported during that same time
period. There were three stress levels: minimal, moderate, and high
stress. The sums of squares appear in the following ANOVA summary
table. The mean for each condition and the number of subjects per
condition are also noted.
Source df SS Between groups 22.167 Within groups 14.750 Total 36.917 MS Stress Level Mean N Minimal 3 4 Moderate 4 4 Source df SS Between groups 22.167 High MS 6 4 a.Complete the ANOVA summary table.
b.Is Fobt significant at α = .05; at α = .01?
c.Perform post hoc comparisons if necessary.
d.What conclusions can be drawn from the F-ratio and the post hoc
comparisons?
e.What is the effect size, and what does this mean?
f.Graph the means. Question 1 (f). A researcher conducted an experiment on the effects of
a new “drug” on depression. The researcher had a control group
that received nothing, a placebo group, and an experimental group
that received the “drug.” A depression inventory that provided a
measure of depression on a 50-point scale was used (50 indicates
that an individual is very high on the depression variable). The
ANOVA summary table appears next, along with the mean
depression score for each condition.
Source df SS Between groups 1,202.313 Within groups 2,118.00 Total 3,320.313
“Drug” Condition Control MS Mean
36.26 n
15 Source df Between groups SS MS 1,202.313 Placebo 33.33 15 “Drug” 24.13 15 a.Complete the ANOVA summary table.
b.Is Fobt significant at α = .05; at α = .01?
c.Perform post hoc comparisons if necessary.
d.What conclusions can be drawn from the F-ratio and the post hoc
comparisons?
e.What is the effect size, and what does this mean?
f.Graph the means. Question 1 (g). A researcher has been hired by a pizzeria to determine
which type of crust customers prefer. The restaurant offers three
types of crust: hand-tossed, thick, and thin. Following are the mean
number of 1-inch pieces of pizza eaten for each condition from 10
subjects who had the opportunity to eat as many pieces with each
type of crust as they desired. The ANOVA summary table also
follows.
Source df Subject SS MS 2.75 Between 180.05 Error 21.65 Total 204.45
Crust Type Mean n Source df Subject SS MS 2.75 Hand-tossed 2.73 10 Thick 4.20 10 Thin 8.50 10 a.Complete the ANOVA summary table.
b.Is Fobt significant at α = .05; at α = .01? c.Perform post hoc comparisons if necessary.
d.What conclusions can be drawn from the F-ratio and the post hoc comparisons?
e.What is the effect size, and what does this mean?
f.Graph the means. Question 2. What is an F-ratio? Define all the technical terms in your answer. Quesation 3. What is error variance and how is it calculated?
Question 4.Why would anyone ever want more than two (2) levels of an independent
variable?
Question 5.If you were doing a study to see if a treatment causes a significant effect, what
would it mean if within groups variance was higher than between groups variance? If
between groups variance was higher than within groups variance? Explain your answer
1. What is the purpose of a post-hoc test with analysis of variance?
2. What is probabilistic equivalence? Why is it important?
Support your paper with a minimum of 5 resources. In addition to these specified resources,
other appropriate scholarly resources, including older articles, may be included.
Length: 5-7 pages not including title and reference pages
References: Minimum of 5 scholarly resources.

Assignment 3.docx

Q 1 (a).
What is the difference between a randomized ANOVA and a repeated measures
ANOVA? What does the term one-way mean with respect to an ANOVA? Q 1 (b). If a researcher decides to use multiple comparisons in a study with three
conditions, what is the probability of a Type I error across these comparisons?
Use the Bonferroni adjustment to determine the suggested alpha level.
Q 1 (C). When should post hoc comparisons be performed?
Q 1 (d) Why is a repeated measures ANOVA statistically more powerful than a
randomized ANOVA? Q 1 (e). In a study of the effects of stress on illness, a researcher tallied
the number of colds people contracted during a 6-month period as a
function of the amount of stress they reported during that same time
period. There were three stress levels: minimal, moderate, and high
stress. The sums of squares appear in the following ANOVA summary
table. The mean for each condition and the number of subjects per
condition are also noted.
Source df SS Between groups 22.167 Within groups 14.750 Total 36.917 MS Stress Level Mean N Minimal 3 4 Moderate 4 4 Source df SS Between groups 22.167 High MS 6 4 a.Complete the ANOVA summary table.
b.Is Fobt significant at α = .05; at α = .01?
c.Perform post hoc comparisons if necessary.
d.What conclusions can be drawn from the F-ratio and the post hoc
comparisons?
e.What is the effect size, and what does this mean?
f.Graph the means. Question 1 (f). A researcher conducted an experiment on the effects of
a new “drug” on depression. The researcher had a control group
that received nothing, a placebo group, and an experimental group
that received the “drug.” A depression inventory that provided a
measure of depression on a 50-point scale was used (50 indicates
that an individual is very high on the depression variable). The
ANOVA summary table appears next, along with the mean
depression score for each condition.
Source df SS Between groups 1,202.313 Within groups 2,118.00 Total 3,320.313
“Drug” Condition Control MS Mean
36.26 n
15 Source df Between groups SS MS 1,202.313 Placebo 33.33 15 “Drug” 24.13 15 a.Complete the ANOVA summary table.
b.Is Fobt significant at α = .05; at α = .01?
c.Perform post hoc comparisons if necessary.
d.What conclusions can be drawn from the F-ratio and the post hoc
comparisons?
e.What is the effect size, and what does this mean?
f.Graph the means. Question 1 (g). A researcher has been hired by a pizzeria to determine
which type of crust customers prefer. The restaurant offers three
types of crust: hand-tossed, thick, and thin. Following are the mean
number of 1-inch pieces of pizza eaten for each condition from 10
subjects who had the opportunity to eat as many pieces with each
type of crust as they desired. The ANOVA summary table also
follows.
Source df Subject SS MS 2.75 Between 180.05 Error 21.65 Total 204.45
Crust Type Mean n Source df Subject SS MS 2.75 Hand-tossed 2.73 10 Thick 4.20 10 Thin 8.50 10 a.Complete the ANOVA summary table.
b.Is Fobt significant at α = .05; at α = .01? c.Perform post hoc comparisons if necessary.
d.What conclusions can be drawn from the F-ratio and the post hoc comparisons?
e.What is the effect size, and what does this mean?
f.Graph the means. Question 2. What is an F-ratio? Define all the technical terms in your answer. Quesation 3. What is error variance and how is it calculated?
Question 4.Why would anyone ever want more than two (2) levels of an independent
variable?
Question 5.If you were doing a study to see if a treatment causes a significant effect, what
would it mean if within groups variance was higher than between groups variance? If
between groups variance was higher than within groups variance? Explain your answer
1. What is the purpose of a post-hoc test with analysis of variance?
2. What is probabilistic equivalence? Why is it important?
Support your paper with a minimum of 5 resources. In addition to these specified resources,
other appropriate scholarly resources, including older articles, may be included.
Length: 5-7 pages not including title and reference pages
References: Minimum of 5 scholarly resources.

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Assignment 3_9316136.docx

Q 1 (a).
What is the difference between a randomized ANOVA and a repeated measures
ANOVA? What does the term one-way mean with respect to an ANOVA?
Randomized ANOVA
1. Repeated measure ANOVA...

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