Chapter 10

Question 1

What is the minimum level of measurement for ANOVA?

Answer 1

Interval

Question 2

When would you use ANOVA instead of a t-test?

Answer 2

When you want to work with more than two groups

Question 3

Describe one-way ANOVA

Answer 3

compares the means of several groups on one factor like different college majors or different continents.

Question 4

Describe two-way ANOVA

Answer 4

compare means of groups that have two or more factors like college major and gender doing those factors at the same time

Question 5

What are main effects in a two-way ANOVA?

Answer 5

Where ONE independent variable effects or influences a dependent variable.

Question 6

What are interactions in a two-way ANOVA?

Answer 6

The two independent variables have a combined effect on the dependent variable that is not present with either independent variable alone.

Question 7

What are all the different probability distribution used for in ANOVA? (type of distribution, positive or negative, symmetrical or not, and disagrees of freedom.) (4)

Answer 7

• F distribution
• ALWAYS POSITIVE
• ALWAYS ASYMMETRICAL
• has multiple degrees of freedom (dfb = k − 1)

Question 8

What are the range of values for eta-squared?

Answer 8

0-1

ZERO TO ONE

Question 9

What goes into calculating eta-squared? (CHECK THIS ONE)

Answer 9

η2 = SSeffect / (SSeffect + SSerror) SS effect = the sum of squares for the difference between the group means, SS error = is sum of squares for the error, or the individual differences in each group that is not predicted by the equation.