Understanding Analysis of Variance

What is a factor in the context of analysis of variance?

• A continuous variable

• A categorical variable

• A dependent variable

• A random variable

When is a single-factor analysis of variance used?

• When there are no factors

• When there is only one factor

• When the factors are continuous

• When there are two or more factors

What statistical test can be used when a factor has only two categories?

• Chi-square test

• ANOVA

• T-test for independent samples

• Regression analysis

What does the two-factor analysis of variance allow you to determine?

• The effect of continuous variables

• The effect of three factors

• The effect of two factors and their interaction

• The effect of one factor only

How are groups formed in a two-factor analysis of variance?

• By random assignment

• By combining the expressions of the two factors

• By using continuous variables

• By using only one factor