11.3 Ackerman & Goldsmith (2011) found that students who studied text from printed hard copy had better test scores than students who studied text presented on a screen. In a related study, a professor noticed that several students in a large class had purchased the e-book version of the course textbook. For the final exam, the overall average for the entire class was ( = 81.7, but the n = 9 students who purchased the e-book had a mean of M = 77.2 with a standard deviation of s = 5.7. Do these data indicate a significant decrease in test scores on the final exam due to the use of a e-book? Use a one-tailed test with o = .05. 11.4 Oishi & Shigehiro (2010) report that people who move from home to home frequently as children tend to have lower than average levels of well-being as adults. To further examine this relationship, a psychologist obtains a sample of n = 12 young adults who each experienced 5 or more different homes before they were 16 years old. These participants were given a standardized well-being questionnaire for which the general population has an average score of u = 40. The well-being scores for this sample are as follows: 38. 37, 41, 35, 42, 40, 33, 33, 36, 38, 32, 39. On the basis of this sample, is well-being for frequent movers significantly different from the well-being of the general population? Test with alpha (@) = .05. Is this a one or two-tailed test