Question 12
2.5 out of 2.5 points
Pet preference was compared for four different types of animals (dogs, cats, birds, and fish)
using a one-way within-groups ANOVA with seven participants. The standard error was
calculated as 0.21. A significant F test indicates that there are differences between the groups.
Which post hoc tests is the researcher most interested in performing given these group means:
Dogs M = 4.43, Cats M = 4.18, Birds M = 2.73, Fish M = 4.07?

Question 13
0 out of 2.5 points
A dependent-samples t test is used when there is (are) _____ groups, and a within-groups
ANOVA is used when there are at least _____ groups.

Question 14
2.5 out of 2.5 points
The z, t, and F calculations have something in common: the numerator (top portion) of the test
statistic:

Question 15
0 out of 2.5 points
Lucille is interested in the effects of alcohol consumption on style of play while playing the
videogame Sims. She asks a group of 15 college students to play Sims under one of the
following conditions: no alcohol, 1 ounce of alcohol, 2 ounces of alcohol, or 3 ounces of alcohol.
Lucille measures on a scale of 1 to 10 how prosocial the students' style of play is. After
collecting the data, Lucille performs an ANOVA and finds that she can reject the null hypothesis.
On this basis, what does Lucille know?

Question 16
2.5 out of 2.5 points
In Tukey's HSD post-hoc test, the HSD stands for:

Question 17
2.5 out of 2.5 points
What is the correct formula for between-groups degrees of freedom?