For a sample of 12 depressed individuals the variance of anx

For a sample of 12 depressed individuals, the variance of anxiety scores is 8 and the mean is 6. For different sample of 14 non-depressed individuals, the variance of anxiety scores is 5 and the mean is 2. Conduct a test to determine whether there is a difference in the population mean anxiety scores between the samples. Set Type I error .05. What are the null and alternative hypotheses? What is the appropriate critical value? What is Hedges\' g? What percentage of variance in the anxiety scores can be attributed to whether or not a person is depressed? An experimental treatment was administered to a sample of 50 patients. Hopefully, if the treatment effective, the average effectiveness score should be positive. The sample of patients had a mean of 2 on the outcome representing the amount of effectiveness. Refer to Exhibit A. what is the alternative hypothesis?

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