quiz 9 Flashcards
(15 cards)
ANOVA includes a sample size denoted by N. It indicates a sample size for one of the groups.
False it indicates it for all groups.
_____ is a popular post hoc analysis in which adjustments are made to the test statistic based on the number of comparisons (not the significance level).
Tukey’s HSD
In ANOVA, which variable is the one on which people differ and for which we are attempting to explain or account for those differences based on group membership?
Outcome
_____ is a test that is “conservative” meaning that it is less likely to commit a Type I error, but it does so at the expense of less power to detect effects.
Scheffe’s Test
H0: 𝜇1 = 𝜇2 = 𝜇3 = 𝜇4 is the null hypothesis for an ANOVA and simply means there is no difference in the group means.
True
The major difference with an ANOVA is that it can handle any number of groups.
True
In ANVOA, which variable is used as our predictor?
Grouping or explanatory
A _____ can have multiple grouping variables but the more you have, the more difficult it will be to find and interpret significant results.
Factorial ANOVA
A _____ divides our significance level α by the number of comparisons we are making so that when they are all run, they sum back up to our original Type I error rate.
Bonferroni test
Can we run multiple analyses on the same dataset?
No, because it increases our Type I error rate or the chance of capitalizing on random chance.
In ANOVA, we calculate the sources of variance using _____.
Sums of Squares (SS)
In ANOVA, we calculate a Mean Squares (MS) for all three sources of variance – between, within, and total.
False
In ANOVA, which of the following is not a source of variance to be compared to determine if the groups have any explanatory value in our outcome variable?
Systematic variance between groups
Random error within groups
Difference scores for each group member (wrong anser here)
In ANOVA, what does k indicate?
The number of groups.
The Bonferroni test, Tukey’s HSD, and Scheffe’s Test are all _____.
Post hoc Tests
