Psychologists are interested to know whether or not Thorazine affects thought disorder symptoms among patients diagnosed with schizophrenia. The null hypothesis is that Thorazine has no effect, and the alternate hypothesis is that there is a difference—that Thorazine does have an effect. The research team has gathered data from two different samples. The first group of participants has not taken the drug, and the second group of participants has been taking Thorazine. In this setup, is this a one-tailed or two-tailed test (and explain why)? Is this an independent samples t-test, repeated measures t-test, or factorial analysis of variance (and explain why)?

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Psychologists are interested to know whether or not Thorazine affects thought disorder symptoms among patients diagnosed with schizophrenia. The null hypothesis is that Thorazine has no effect, and the alternate hypothesis is that there is a difference—that Thorazine does have an effect. The research team has gathered data from two different samples. The first group of participants has not taken the drug, and the second group of participants has been taking Thorazine. In this setup, is this a one-tailed or two-tailed test (and explain why)? Is this an independent samples t-test, repeated measures t-test, or factorial analysis of variance (and explain why)?

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