Q2.

What type of graph is often used to display frequency of a discrete, scale variable?

a. scatterplot

b. histogram

c. bar graph

d. line graph

Q4

In a study with three levels of factor A, how many degrees of freedom will this factor have?

Group of answer choices

a. 3

b. 4

c. 1

d. 2

Q9 A 3 x 3 x 3 x 3 design has _____ potential main effects.

Group of answer choices

a. 4

b. 3

c. 81

D. 12

Q7. If 20 participants were randomly selected and assigned to complete anattention task twice - once after consuming a sugar pill and once after consuming a pill that contained 25 mg nicotine, which type of research would this most likely be?

Group of answer choices

a. descriptive

b. predictive

c. experimental

d. none of the above

Q8

If 20 participants completed an attention tasktwice- once after consuming a sugar pill and once after consuming a pill that contained 25 mg nicotine, which test would be most appropriate? Assume data meets all assumptions for a parametric test.

Group of answer choices

a. Independent samples t-test

b. One-way (repeated measures) ANOVA

c. One-way (between subjects) ANOVA

d. Correlated groups t-test