Answer Happy

S-adenosyl methionine (SAM-e) is a naturally occurring compound in human cells that is thought to have an effect on depression symptoms. Suppose that a researcher is interested in testing SAM-e on patients who are struggling with Parkinson's. She obtains a sample of n = 20 patients and asks each person to take the suggested dosage each day for 1 weeks. At the end of the 1-week period, each individual takes the Beck Depression Inventory (BDI), which is a 21-item, multiple-choice self-report inventory for measuring the severity of depression. The scores from the sample produced a mean of M = 24.4 with standard deviation of s = 6.02. In the general population of Parkinson's patients, the standardized test is known to have a population mean of u = 27.2. Because there are no previous studies using SAM-e with this population, the researcher doesn't know how it will affect these patients; therefore, she uses a two-tailed single- sample t-test to test the hypothesis. From the following, select the correct null and alternative hypotheses for this study: [ Select] Assume that the depression scores among patients taking SAM-e are normally distributed. The degrees of freedom for this study are: (Select] The critical t scores (the values that define the borders of the critical region) for a = .01 are: [ Select]
Using the data from the previous question compute the observed t-statistic. tobs = (round to 2 decimals) Question 32 3 pts Based on the t-test you just computed answer the following: the observed t [ Select] in the critical region. Therefore, the null hypothesis (Select] rejected. Thus, the researcher (Select] conclude that SAM-e has a significant effect on the moods of Parkinson's patients.