Analysis-of-variance-statistics-homework-help

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1.  Discuss each aspect of these results:

F-value is less than 0.05

A.  Yes.

B.  No.

Answer:  Choose an item.

We should reject the null hypothesis:

A.  Yes.

B.  No.

Answer:  Choose an item.

2. The null hypothesis for the Baird and Sands (2004) study that focuses on the effect of the GI with PMR treatment on patients’ mobility level

A.  The mean mobility scores are the same for the two groups.

B.  The mean mobility scores are not the same for the two groups.

Answer:  Choose an item.

Please provide a short rationale for your answer:

3.  The researchers stated that the participants in the intervention group reported a reduction in mobility difficulty at week 12. Was this result statistically significant, and if so what probability?

A.  Yes, at the 0.05 level, but not at the 0.001 level.

B.  No, at the 0.05 level.

C.  Yes, at the 0.001 level.

Answer:  Choose an item.

4.  If the researchers had set the level of significance or alpha=0.01, would the results of p=0.001 still be statistically significant?

A.  Yes.

B.  No.

Answer:  Choose an item.

5.  If F(3,60)= 4.13, p=0.04, and α=0.01, is the result statistically significant? Would the null hypothesis be accepted or rejected?

A.  Yes. Reject the null hypothesis.

B.  Not significant. Do not reject the null hypothesis.

C.  Yes. Do not reject the null hypothesis.

D.  Not significant. Reject the null hypothesis.

Answer:  Choose an item.

Please provide a short rationale for your answer:

6.  Can ANOVA be used to test proposed relationships or predicated correlations between variables in a single group?

A.  Yes.

B.  No.

Answer:  Choose an item.

Please provide a short rationale for your answer:

7.  If a study had a result of F (2,147) = 4.56, p=0.003, how many groups were in the study, what was the sample size?

A.  2,  146

B.  2,  147

C.  3,  147

D.  3,  150

Answer:  Choose an item.

Please provide a short rationale for your answer:

8.  The researchers state that the sample for their study was 28 women with a diagnosis of OA, and that 18 were randomly assigned to the intervention group and 10 were randomly assigned to the control group. Discuss the study strengths and/or weaknesses in this statement.

Random assignment of group

A.  This is a strength of the study.

B.  This is a weakness of the study.

Answer:  Choose an item.

Please provide a short rationale for your answer:

Imbalance of subjects (unequal numbers) in the two groups 

A.  This is a strength of the study.

B.  This is a weakness of the study.

Answer:  Choose an item.

Please provide a short rationale for your answer:

Small sample size

A.  This is a strength of the study.

B.  This is a weakness of the study.

Answer:  Choose an item.

Please provide a short rationale for your answer:

9.  In your opinion, have the researchers established that guided imagery (GI) with progressive muscle relaxation (PMR) reduces pain and decreases mobility difficulties in women with OA?

A.  Yes.

B.  No.

Answer:  Choose an item.

10.  The researchers stated that this was a 12-week longitudinal, randomized clinical trial pilot with 28 women over 65 years of age with the diagnosis of OA. What are some of the possible problems or limitations that might occur with this type of study?

Assignment of group is not blinded (i.e. assigned group is known) 

A.  This statement is possible.

B.  Not possible.

Answer:  Choose an item.

Please provide a short rationale for your answer:

Small sample size 

A.  This statement is possible.

B.  Not possible.

Answer:  Choose an item.

Please provide a short rationale for your answer:

Loss to follow-up (not show up at Week 12)

A.  This statement is possible.

B.  Not possible.

Answer:  Choose an item.

Cross over of subjects to the other group 

A.  Possible.

B.  Not possible.

Answer:  Choose an item.

No problems or limitations 

A.  This statement is possible.

B.  Not possible.

Answer:  Choose an item.

 
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