PSYC 204 Lecture Notes - Lecture 19: Null Hypothesis, Pearson Product-Moment Correlation Coefficient, Univariate
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Study = examine relation between marital status & gender of high-powered lawyers in national law. A random selection of male & female lawyers yielded following data. *use marginal frequency row column: test at = 0. 01, state h0 null hypothesis. H1: os es & = 0. 01 gender & marital status dependent/related in population. E = expected frequencies: find critical value 2" r =2 & c = 3 df = (r-1)(c-1)= (2-1)(3-1) = 2 & = 0. 01 so critical. 2"df, = 2"2, 0. 01= 9. 21 so use 0. 99. Cannot reject/accept h0 null hypothesis & reject h1 alt. With p > 0. 01 so gender & marital status independent in population with p > 0. 01: compare & conclude. 2obs < 2"1, 0. 01: answer, test at = 0. 05, state h0 null hypothesis. H0: os = es gender & marital status independent in population. H1: os es & = 0. 05 gender & marital status dependent/related in population.
