![]() ![]() The expected frequencies are such that the proportion of households who recycle is the same for all interventions: When to use the chi-square test of independence Observed and expected frequencies (observed above, expected below) Intervention The expected frequency for row r and column c is:Įxample: Expected valuesThe city calculates the expected frequencies using the contingency table. You can calculate the expected frequencies using the contingency table. The expected frequencies are such that the proportions of one variable are the same for all values of the other variable.
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