Deck 7: Differences Between Three or More Conditions

Question 1

From the pairwise comparisons, which comparison has the greatest mean difference?

A)Chronic Fatigue group and the healthy group
B)MS group and the healthy group
C)Chronic Fatigue and the MS group
D)All the comparisons are similar

Answer 1

MS group and the healthy group

Question 2

Which of the pairwise comparisons is not significant?

A)Chronic Fatigue group and the healthy group
B)MS group and the healthy group
C)Chronic Fatigue and the MS group
D)All the comparisons are statistically significant

Answer 2

Chronic Fatigue and the MS group

Question 3

ANOVA
stress

Multiple Comparisons
stress Bonferroni

.The mean difference is significant at the 0.05 level.
Which is the correct statement? There is a significant Omnibus F test:

A)F_2,35=13.09;p=.000
B)F_2,33=13.09;p=.001
C)F_2,33=13.09;p<.001
D)F_2,35=13.09;p<.001

Answer 3

F_2,33=13.09;p<.001

Question 4

Questions relate to the following output, which relates to a Friedman test, which compares scores at three timepoints on depression.Researchers used the exact test.
Ranks
Test Statistics^a
a.Friedman Test
Which is not true?

A)Ranks are higher at baseline and then reduce over time
B)Ranks are lower at baseline and then increase over time
C)Ranks at 6 and 12 months show little difference
D)There is a difference between ranks at baseline and scores at 12 months

Question 5

Which is true?

A)There are twenty participants in the study
B)The analysis is not statistically significant
C)The analysis is statistically significant at p=.001
D)The degrees of freedom is 3

Question 6

Which is the most likely situation in which a researcher would carry out a repeated measures ANOVA? The researcher has:

A)three groups of people: participants with Classic Migraine, Vestibular Migraine and, Ménière's disease where the data is skewed
B)three groups of people: participants with Classic Migraine, Vestibular Migraine and, Ménière's disease where the data is normally distributed
C)one group of people who are tested at three timepoints, where the data is skewed
D)one group of people who are tested at three timepoints, where the data is normally distributed

Question 7

If a researcher carries out 'post hoc comparisons' this means that the researcher has decided to look at

A)pairwise comparisons before the main analysis has been run
B)pairwise comparisons after the main analysis has been run
C)which comparisons have priority over the others
D)the way in which the variables relate to each other

Question 8

In repeated measures ANOVA, the F value =

A)within groups variance ÷ between groups variance
B)within groups variance ÷ between groups variance with individual differences removed
C)between groups variance ÷ within groups variance
D)between groups variance ÷ within groups variance with individual differences removed

Question 9

Questions relate to the following output, which relates to a Friedman test, which compares scores at three timepoints on depression.Researchers used the exact test.
Ranks
Test Statistics^a
a.Friedman Test
A Kruskall Wallis test is a test which looks at the difference in:

A)ranks between three repeated measures conditions, and is especially useful when data is skewed
B)scores between three independent groups, and is especially useful when the data is normally distributed
C)scores between three repeated measures conditions, and is especially useful when the data is normally distributed
D)ranks between three independent groups, and is especially useful when data is skewed

Question 10

Which is the most likely situation in which a researcher would carry out an independent group ANOVA? The researcher has:

A)three groups of people: participants with Classic Migraine, Vestibular Migraine and Ménière's disease where the data is skewed
B)three groups of people: participants with Classic Migraine, Vestibular Migraine and Ménière's disease where the data is normally distributed
C)one group of people who are tested at three timepoints, where the data is skewed
D)one group of people who are tested at three timepoints, where the data is normally distributed