ences the outcome of a hypothesis fest. 10. A random sample is selected from a normal popula- tion with a mean of u = 40 and a standard deviation of o = 6. After a treatment is administered to the individuals in the sample, the sample mean is found to be M = 37. a. If the sample consists of n = 36 scores, is the sample mean sufficient to conclude that the treat- ment has a significant effect? Use a two-tailed test with a = .05. b. If the sample consists of n = 9 scores, is the sample mean sufficient to conclude that the treatment has a significant effect? Use a two-tailed test with a = .05. c. Comparing your answers for parts a and b, explain how the size of the sample influences the outcome of a hypothesis test