Chi Square

Question 1

Chi Square Tests

Answer 1

Test that examine the significance of patterns in qualitative data. The test is based on counts, or frequencies that represent the number of items that fall in each category. The test statistic measures the agreement between actual counts (observed) and expected counts assuming the null hypothesis.
Can have goodness-of-fit, 2x2, or axb test.
Hypotheses make assumptions about differences in proportion of a sample characteristic to that of the population.

Question 2

Goodness of Fit test

Answer 2

A Chi square test that uses frequency data from a sample to test hypotheses about the shape or proportions of a population.

Question 3

Chi Square test for Independence

Answer 3

tests the relationship between two variables in a populations (2x2) or tests hypotheses about differences between proportions for two or more populations (axb).
Tests for significant associations.

Question 4

Yates Correction

Answer 4

A correctional procedure applied to Chi square tests when one of the expected cells is less than 5 (2x2) or less than 2 (axb), or when the grand total is less than 40.