Test for Independence

Test Using Contingency Tables

When data can be tabulated in the table from in terms of frewuencies, several hypothesis can be tested by using the chi-square test. Two such tests are the independence of variables test and the homogenety of proportions test.

·         The test of independence is used to determine wether 2 variables are independent of or related to each other when a single sample is selected.

Steps:

·         State the hypotheses

·         Find the degree of freedom

·         Find the expected value

·         Find the test value

·         Find the critical value

·         Make a decision

·         Summarize

Test for homogenety of proportions

·         It is used ti determine wether the proportions for variables are equal when several samples are selected from different populations.

Steps:

·         State the hypotheses

·         Find the critical value

·         Find the test value

·         Make a decision

·         Summarize