In a study examining the effects of gender (male or female) and major (psychology, philosophy, or biology) on college students' willingness to perform community service work, what is the factorial notation?

Group of answer choices

1.

a ) 2 x 2

b) 2 x 4

C) 1 x 6

D) 2 x 3

2

Using designs with more than two levels of an independent variable allows researchers to

Group of answer choices

a) compare more than two kinds of treatment in one study.

b) compare two or more kinds of treatment with a control group.

C) compare a placebo group to the control and experimental groups.

D) all of these options are correct

3

If the null hypothesis for an ANOVA is true, then theF-ratio should be

Group of answer choices

a) greater than 5.00.

b) a negative number.

c) 0.00.

D) 1.00.

4

Which of the following is NOT an assumption of the one-way randomized ANOVA?

Group of answer choices

a) The data are interval or ratio.

b) The underlying distribution is skewed.

c) The variance among the populations being compared are homogeneous.

D) All of the alternative are correct.