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3. Hypothesis tests are quick and easy in SPSS. Let's do a hypothesis test to answer the following research question: Are women more likely to
3. Hypothesis tests are quick and easy in SPSS. Let's do a hypothesis test to answer the following research question: Are women more likely to assault another person than men? a. First, write out the null and alternative hypotheses. In this case, no sex differences would be evidenced by an even probability of assault. That is, p = .50. b. What probability distribution will be used to answer this question? c. What alpha level will you use?-typical values are .05, .01, and .001, with smaller alpha values reflecting more difficult criteria. d. Binomial Hypothesis Tests in SPSS: Do this by clicking analyze->nonparametric tests->legacy dialogues-> binomial. Put the variable "Maleoff" into the "test variable list." Set "test proportion" to.50: i. The output you receive gives you two pieces of information: The "observed prob" is the probability of being in group 1 versus group 2. The "Exact Sig (2-tailed)" column will have a value in it. This is the exact value for pin this analysis; if it is equal to .000, it is actually even smaller than . 001. e. Using the output from this model, what do you conclude about the null hypothesis? Substantively, what does this mean?Binomial Test Observed Exact Sig. Category Prop. Test Prop. (2-tailed) Male offender =1, Group 1 female .19 .50 <.001 o="female" offender group male .81 total>
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