Multiple Choice Questions

Before completing the book’s Coder/Hacker chapter exercises, take this multiple-choice pre-test from the end of the chapter. 

Next, visit the Coder and Hacker Chapter exercises page for more.

1: What is the primary purpose of ANOVA?

  1. Comparing means across three or more groups
  2. Comparing medians across three or more groups
  3. Examining the relationship between two categorical variables
  4. Identifying normally distributed data

Ans: A

2: Which of the following assumptions does not apply to ANOVA?

  1. Independent observations
  2. Normal distribution of continuous variable
  3. Homogeneity of variances
  4. Inclusion of one bivariate variable

Ans: D

3: How many pairwise comparisons would there be for an ANOVA with four groups?

  1. 16
  2. 4
  3. 12
  4. 6

Ans: D

4: Apply a Bonferroni adjustment to a p-value of .01 if the analyses included six pairwise comparisons. If the threshold for statistical significance were .05, would the adjusted p-value be significant?

  1. Yes
  2. No

Ans: B

5: In which situation would you use planned comparisons?

  1. After a significant ANOVA to compare each pair of means
  2. Instead of an ANOVA when the data did not meet the normality assumption
  3. When you have to choose between two categorical variables
  4. When you conduct an ANOVA and have hypotheses about which sets of means are different from one another

Ans: D