1. The one-way ANOVA is a little different from other tests because it uses the
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Question
1. The one-way ANOVA is a little different from other tests because it uses the ratio of different types to test a hypothesis. The _____ variance should be roughly equal for the groups because the ANOVA assumes homogeneity of variance.
A. between-group
B. within-group
C. cohort-group
D. control-group
E. blind-group
2. To test for homogeneity of variance between the groups in a two-way ANOVA, the _____ test is used.
A. Levene's
B. Bonferroni
C. Box's M
D. Duncan
E. None of the above
3. When analyzing the results of the N-way ANOVA, one can say that a statistically significant difference between the means of the categories exists when the:
A. p-value of the computed f-statistic is less than a level chosen
B. computed f-statistic is more than the p-value
C. p-value of the computed f-statistic is more than a level
D. p-value and f-value are the same as a level
E. None of the above
4. When a null hypothesis is false after using the one-way ANOVA, it indicates there is some overlap, but the researcher still does not know exactly which variable is overlapping and by how much. This can lead to a type I error. To avoid this, _____ will decrease the likelihood of an error.
A. a post hoc test
B. a Kruskal-Wallis H-test
C. a chi-square test
D. the f test
E. None of the above
5. The N-way ANOVA is similar to the _____ as it can only tell us whether differences between the mean exist.
A. MANOVA
B. two-way ANOVA
C. one-way ANOVA
D. three-way ANOVA
E. None of the above
Explanation / Answer
1)
B. within-group
Justification
The objective of ANOVA is to test mean between groups. The variance within-group for each of groups are assumed to be equal. If not, they can confound.
2)
A. Levene's
Justification
Bonferroni is p-value correction
Box-M is to test for Multivariate Normality
Duncan's Multiple Range test (DMRT) is a post hoc test to measure specific differences between pairs of means
3)
A. p-value of the computed f-statistic is less than a level chosen
Justification
p-value will have to less than significant level chosen to conclude means are different
All other statements does not make sense
4)
A. a post hoc test
Justification
post hoc test can be Duncan Tukey
Kruskal-Wallis H-test is test for comparing medians
Chi-square test is to test variance significance
f test is to test ratio of variance
5)
A. MANOVA
Justification
N-way ANOVA and MANOVA mean the same
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