Discussion:
Q: A researcher is testing the effectiveness of a new herbal supplement that claims to improve memory performance. A sample of n = 25 college students is obtained and each student takes the supplement daily for six week. At the end of the 6-week period, each student is given a standardized memory test, and the average score for the sample is M = 39. For the general population of college students, the distribution of test scores is normal with a mean of µ = 35 and a standard deviation of σ = 15. Do students taking the supplement have significantly better memory scores? Use a one-tailed test with α = .05.
These data ________(are OR are not ) sufficient to conclude that the supplement has a significant effect.