-stating correctly whether the test is a one-tailed or two-tailed test- stating the correct Null and Alternative Hypotheses.-stating the alpha (z-value from unit normal table) for the boundary of the critical regionfor a one-tailed test or two-tailed test.-calculating OM-calculating the test statistic (z-score) 3. A researcher is testing the effectiveness of a new herbal supplement that claims toimprove memory performance. A sample of n=25 college students is obtained and eachstudent takes the supplement daily for 6 weeks. At the end of the 6 weeks, each studentis given a standard memory test, and the average score for the sample is M=39. For thegeneral population of college students, the distribution of test scores is normal with amean of u= 35 and a standard deviation of o= 15. Do students taking the supplementhave significantly better memory scores? a= .05.a. one-tailed or two-tailed test?b. Но:НА:C. alpha: z value=d. gu=e. test statistic: z-score=f. Decision:

Note: Hi there! Thank you for posting the question. As your question has more than 3 parts, we have solved only the first three subparts for you. If you need any specific subpart to be answered, please re-submit the question by specifying the subpart number or name.(a). State whether the test is one-tailed or two-tailed: Here, the researcher is specially interested in testing the effectiveness of a new herbal supplement that claims to improve memory performance. Here, the hypotheses test is One-tailed.(b). State the null and alternate hypotheses: The investigator is interested to test whether the population mean is greater than 35 or not. Denote the population mean as μ. The hypotheses are given below: Null hypothesis: H0 : μ ≤ 35 That is, the population mean is less than or equal to 35. Alternative hypothesis: Ha : μ > 35 (Right tail test). That is, the population mean is significantly greater than 35. (c). Find the critical value: The level of significance is α = 0.05. EXCEL formula to compute critical value is “=NORM.S.INV(0.95, TRUE)” Thus, the critical value is 1.645.