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.

Test for Independence

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

Steps:

·      1.   State the hypotheses

·      2.  Find the degree of freedom

·     3.   Find the expected value

·     4.   Find the test value

·    5.     Find the critical value

·    6.     Make a decision

·     7.   Summarize

Test for homogenety of proportions

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

Steps:

·        1.  State the hypotheses

·         2. Find the critical value

·      3.   Find the test value

·       4.   Make a decision

·       5.   Summarize

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