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Nonparametric Tests . Nonparametric tests are those that do not rely on probability distributions for population parameters They are used when Data are badly skewed Sample sizes are small Data are not on an interval or ratio scale . Chi-Square and Goodness of Fit Test.

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## Nonparametric Tests

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**Nonparametric Tests**• Nonparametric tests are those that do not rely on probability distributions for population parameters • They are used when • Data are badly skewed • Sample sizes are small • Data are not on an interval or ratio scale**Chi-Square and Goodness of Fit Test**• Chi-square tests assess the differences in frequencies of two or more categories • This is commonly referred to as a goodness of fit test • Formula for a goodness of fit test**Interpreting a χ2**• Chi-squares are interpreted by comparing the obtained value from the formula to a critical value obtained from a table

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