ANOVA Quiz

Why is ANOVA used instead of several t-tests?

• To reduce the number of groups

• To avoid the type-I error rate

• To increase the number of comparisons

• To simplify the calculations

What is the formula for the number of comparisons (c) if there are "a" groups?

• c = a(a-1)/2

• c = a(a+1)/2

• c = a(a-2)/2

• c = a(a+2)/2

What is the experiment-wise error rate if you want a .05 alpha for experiment-wise comparisons?

• .05

• .0125

• .10

• .15

What is the null hypothesis (H0) in an ANOVA test comparing the average opinion of the university climate among sophomores, juniors, and seniors?

• There are differences in opinions across all class ranks.

• There are no differences in opinions across all class ranks.

• At least two class ranks differ.

• All class ranks have the same opinion.

What is the alternative hypothesis (H1) in an ANOVA test comparing the average opinion of the university climate among sophomores, juniors, and seniors?

• There are differences in opinions across all class ranks.

• There are no differences in opinions across all class ranks.

• At least two class ranks differ.

• All class ranks have the same opinion.

In a study which tests the effectiveness of 3 teaching techniques, how many ways are there?

• 1

• 2

• 3

• 4

Identify the number of ways in a 2 x 3 study.

• 1

• 2

• 3

• 4

Identify the number of ways in a 5 x 3 x 2 study.

• 1

• 2

• 3

• 4

Which of the following is the first step in ANOVA?

• Compute F_obtained

• Choose the Type I error rate

• State the null and alternate hypotheses

• Find the corresponding P_obtained value

What does a small P_obtained value correspond to in ANOVA?

• Larger F_obtained

• Smaller F_obtained

• Larger Type I error rate

• Smaller Type I error rate