See attached file
Q 1 (a).
What is the difference between a randomized ANOVA and a repeated measures ANOVA? What does the term oneway 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 6month 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 F_{obt} significant at α = .05; at α = .01?
c.Perform post hoc comparisons if necessary.
d.What conclusions can be drawn from the Fratio 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 50point 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 F_{obt} significant at α = .05; at α = .01?
c.Perform post hoc comparisons if necessary.
d.What conclusions can be drawn from the Fratio 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: handtossed, thick, and thin. Following are the mean number of 1inch 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  
Handtossed  2.73  10  
Thick  4.20  10  
Thin  8.50  10 
a.Complete the ANOVA summary table.
b.Is F_{obt} significant at α = .05; at α = .01?
c.Perform post hoc comparisons if necessary.
d.What conclusions can be drawn from the Fratio 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 Fratio? 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
 What is the purpose of a posthoc test with analysis of variance?
 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: 57 pages not including title and reference pages
References: Minimum of 5 scholarly resources.
Top Answer
Please find the... View the full answer