# Quiz 2: Two-way Tables

Test your knowledge of the material on two-way tables in the following quiz.

1. What is the best way to test the significance of the association between two categorical variables in a two-way frequency table?
1. Using a chi-square test
2. Using a t-test
3. Using a one-way ANOVA
4. Using a linear regression
1. What is the best measure used to quantify the strength of association between two categorical variables in a two-way frequency table?
1. Chi-square test
2. Cramer’s V
3. Pearson’s correlation coefficient
4. Odds ratio
5. None of the above
1. What is the null hypothesis for a chi-square test of independence in a two-way frequency table?
1. The two variables are independent
2. The two variables are dependent
3. The two variables are correlated
4. The two variables are not correlated
1. What is the alternative hypothesis for a chi-square test for independence in a two-way frequency table?
1. The two variables are independent
2. The two variables are dependent
3. The two variables are uncorrelated
4. None of the above
1. What are the assumptions for the validity of a chi-square test for independence in a two-way frequency table?
1. The observations are independent and randomly sampled
2. The expected frequencies for each cell in the table are greater than 5
3. The variable are categorical
4. All of the above
1. When interpreting the results of a chi-square test for independence in a two-way frequency table, what does a p-value of less than 0.05 indicate?
1. There is evidence of association between the two variables
2. There is no evidence of association between the two variables
3. The variables are correlated
4. The variables are uncorrelated
1. How do you interpret the p-value in a chi-squared test for independence in a two-way frequency table?
1. A small p-value indicates evidence against the null hypothesis
2. A large p-value indicates evidence against the null hypothesis
3. A small p-value indicates evidence in favor of the null hypothesis
4. A large p-value indicates evidence in favor of the null hypothesis.
1. When both variables are ordered in a two-way frequency table, the most focused test for association is:
1. The Pearson chi-squared test
2. The Likelihood ratio chi-squared test
3. The CMH test for general association
4. The CMH test for non-zero correlation