Chi-Square Tests

Chi-Square Tests

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Definitions

Chi-square distribution

A distribution obtained from the multiplying the ratio of sample variance to population variance by the degrees of freedom when random samples are selected from a normally distributed population

Contingency Table

Data arranged in table form for the chi-square independence test

Expected Frequency

The frequencies obtained by calculation.

Goodness-of-fit Test

A test to see if a sample comes from a population with the given distribution.

Independence Test

A test to see if the row and column variables are independent.

Observed Frequency

The frequencies obtained by observation. These are the sample frequencies.