CJUS K300 1nd Edition Lecture 16 Outline of Last Lecture I Hypothesis Tests Percents Outline of Current Lecture II Hypothesis Testing with 2 Population Means Current Lecture Example Does peer approval or disapproval of stealing from employers effect how often individuals steal Group 1 Peers do not approve of stealing from employers n1 40 x 1 5 1 s 1 1 8 Group 2 Peers approve of stealing from employers n2 25 x 2 8 2 s 2 1 9 t obt are x 1 x 2 2 2 s1 s2 n1 n 2 For these we always use the t distribution no matter what the sample sizes Choose an alpha of 01 H 0 u 1 u2 H i u 1 u2 These notes represent a detailed interpretation of the professor s lecture GradeBuddy is best used as a supplement to your own notes not as a substitute t obt 5 1 8 2 1 82 1 92 40 25 6 6 df n1 n2 2 df 40 25 2 63 Tcrit 2 3 so we reject the null We are 99 confident that the population of peers who do not approve steal less often than the population of those who approve
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