Chapter 12 iClicker Questions
1. An ANOVA stands for:
a) analysis of variance.
b) analysis of operative variability.
c) analysis of covariance.
d) analysis of associated variance.
When comparing three or more groups we use ANOVA. It would be incorrect to instead
conduct many t tests. Doing so would increase the chances of making a:
a) Type I error.
b) Type II error.
c) Type III error.
d) All of the above.
3. Below is the F statistic which indicates the ratio of two measures of variability. If the withingroups variance is much larger than the between-groups variance, we can infer that:
between-groups variance
F=
within-groups variance
a) the sample means are different from one another.
b) there is no difference between the sample means.
c) the sample means are equal to one another.
d) the sample means are not different from one another.
4. __________________ is a hypothesis test in which there are more than two samples and each
sample is composed of different participants.
a) Mixed factors ANOVA
b) Between-groups ANOVA
c) Within-groups ANOVA
d) Factorial ANOVA
5. If variances between groups are equal, we refer to this as:
a) standardized coefficient.
b) standard error of the mean.
c) pooled variance.
d) heteroscedasticity.
6. The formula for the degrees of freedom for a between-groups ANOVA is which of the
following?
a) df = N-1
b) df = N-1 + dfbetween/dfwithin
c) dfbetween = dfwithin + 1/N
d) dfbetween = Ngroups – 1
7. The figure below provides three different distributions. Based on a visual inspection of these
distributions, which would give you the best outcome for an ANOVA?
a) a
b) b
c) c
d) a and c
8. The source table below provides us with information necessary to conduct an ANOVA. What
previously learned statistical measure best describes column 4 of the source table?
a) standard deviation
b) standard error of the mean
c) variance
d) pooled variance
9. When conducting a one-way ANOVA how many sums of squares are calculated?
a) one
b) two
c) three
d) four
10. To find the effect size for ANOVA we calculate
a) Cohen’s d
b) R2
c) the p value
d) the mean square
11. A test that is conducted when there are multiple groups of scores but specific comparisons
have been chosen prior to data collection is called
a) a planned comparison
b) a post-hoc test
c) a Bonferroni test
d) a Tukey HSD test
12. ___________________ is a statistical procedure frequently carried out after we reject the
null hypothesis in an analysis of variance. It allows us to make multiple comparisons among
several means.
a) A post-hoc test
b) A parametric test
c) A nonparametric test
d) Null hypothesis
13. What are two frequently used post-hoc tests?
a) ANOVA and Tukey HSD
b) Bonferroni and Tukey HSD
c) Split-halves and Cronbach’s alpha
d) Cronbach’s alpha and Tukey HSD