Chi-Square - Goodness of Fit

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Presentation transcript:

Chi-Square - Goodness of Fit Section 2 Chi-Square - Goodness of Fit

Chi-Square Goodness of Fit Test determines if proportions in one situation hold true in a different situation used to test the hypothesis that an observed frequency distribution fits (or conforms to) some claimed distribution

Formulas E = n • p df = k – 1 (k = number categories) *always right-tailed test

Example Mars, Inc. claims that its M&M plain candies are distributed with the following percentages: Color % O E Brown 13 4 2.86 Yellow 14 3 Red 1 Orange 20 5 Green 16 Blue 24 Use a 5% level of significance to test the claim

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