Chi Square 0.0 / 5 ? PsychologyVisual SystemUniversitySQA Created by: xoemmamclCreated on: 24-11-17 20:55 What is Nominal Data? It is categorical data. Discrete named categories. How many in each category? Frequency or %. 1 of 8 What is a Chi Square? It tells us how well data fits the null hypothesis (expected frequencies). Small x2 - data fits H0 Large x2 - data does not fit h0. 2 of 8 What are Expected Frequencies? Frequencies are expected if the null hypothesis were true. May reflect no preference or no difference from a comparison population. 3 of 8 What are observed frequencies? Frequencies that have been actually obtained from a sample. 4 of 8 Observed Frequencies Significance p .05 NOT SIGNIFICANT, observd freq do not differ from expected, sample fits distribution. 5 of 8 What is the Chi Square test of goodness of fit? Compares the frequencies of categories within one nominal variable. 6 of 8 What are the assumptions of a chi square? Nominal data, independent observations, expected frequencies. 7 of 8 What is the Test of Association? This tests for association between two nominal variables. 8 of 8
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