A researcher wishes to determine if the use of an herbal ext

A researcher wishes to determine if the use of an herbal extract improves memory. Subjects will take the herbal extract regularly during a 10-week period of time. After this course of treatment, each subject has his or her memory tested using a standard memory test. Suppose the scores on this test of memory for all potential subjects taking the herbal extract follow a Normal distribution with mean and standard deviation = 6. Also, suppose that in the general population of all people, scores on the memory test follow a Normal distribution, with mean = 50 and standard deviation = 4. The researcher, therefore, decides to test the hypotheses H0: = 50, Ha: > 50 To do so, the researcher has 100 subjects follow the protocol described above. The mean score for these students is = 55.2 and the P-value is less than 0.0001. Suppose that another researcher attempts to replicate the study described above. She uses a sample of 10 subjects and observes a sample mean memory score of 55.2, the same as the sample mean described in the first study. It is appropriate to conclude which of the following?

Solution

Options are required to conclude the answer, but the p-value of large sample will be less than that of smaller sample if sample mean is same (which it is)