Which of the following accurately states the chi-square test for independence?
1. It is similar to correlation because it uses one sample to evaluate the relationship between two variables.
2. It is similar to single-sample t test because it uses one sample to test a hypothesis about one population.
3. It is similar to both correlation and an independent-measures t test because it can be used to evaluate a relationship between variables or a difference between populations.
4. It is similar to an independent-measures t test because it uses separate samples to evaluate the difference between separate populations.