s-adenosyl methionine (SAM-e) is a naturally occurring compound in human cells t
ID: 3066964 • Letter: S
Question
s-adenosyl methionine (SAM-e) is a naturally occurring compound in human cells that is thought to have an effect or depression symptoms. Suppose that a researcher is interested in testing SAM-e on patients who are struggling with HIV. He obtains a sample of n 20 patients and asks each person to take the suggested dosage each day for 4 weeks. At the end of the 4-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-27.9 with standard deviation of s 3.20. In the general population of HIV patients, the standardized test is known to have a population mean of u 30.3. Because there are no previous studies using SAM-e with this population, the researcher doesn't know how it will affect these patients; therefore, he 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: O Ho: SAM-e # 30.3: Hi : SAM-e 30.3 O HO: SAM-e 30.3; H1: pSAM-e 30.3 e that the depression scores among patients taking SAM-e are normally distributed. You will frst need to determine the degrees of freedom. There are degrees of freedom. Use the t distribution table to find the critical region for a 01 To see the table, cick on the arrow and then on the words "The t D stribution that appear in the space below The critical t scores (the values that define the borders of the critical region) are The estimated standard error isExplanation / Answer
Hypothesis:
H0 : mu = 30.3
H1 : mu not equal to 30.3
There are 19 degrees of freedom
Critical scores are = +/- 2.861
The estimated std. error is = 3.20/sqrt(20)
= 0.7155
Test statistics:
M = 27.9 , mu = 30.3 , s = 0.7155
t = ( M -mu) / s
= ( 27.9 - 30.3)/0.7155
= -3.3543
The t statistic is in the critical region Therefore, the null hypothesis can be rejected.
Therefore, researcher can conclude that sam-e has significant effect on the moods of hiv patients.
Related Questions
Navigate
Integrity-first tutoring: explanations and feedback only — we do not complete graded work. Learn more.