Chapter 17- Chi- Square Statistic

Chapter 17- Chi- Square Statistic - Chapter 17 The Chi...

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Chapter 17: The Chi - Square’ Statistic:’ Tests’ for’ Goodness’of’Fit’and’Independence Chi-Square Test for Goodness of Fit: Sample data is used to test the hypothesis about the shape or proportions of a population distribution. It tells us how close the sample proportions are to the to the null hypothesis. Observed Frequency: Number of participants counted in each category Expected Frequency: The frequency that is predicted by the null hypothesis. The expected frequencies define an ideal hypothetical sample distribution. Chi-Square Test for Independence: Uses the frequency data from a sample to evaluate the relationship between 2 variables in the population. Formulas and Symbols
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SPSS Putting in the Data: 1. Enter the set of observed frequencies in the first column of the SPSS data editor. If there are four categories, for example, enter the four observed frequencies. 2. In the second column, enter the numbers 1, 2, 3, and so on, so that there is a number beside each of the observed frequencies in the first column.
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Chapter 17- Chi- Square Statistic - Chapter 17 The Chi...

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