51/If a psychologist tests whether a new teaching method is more effective than the old one, the research hypothesis is that: A) there is no difference in effectiveness of the old and new teaching methods B) the new teaching method is more effective than the old teaching method C)there is a difference in effectiveness between the two methods, but no prediction is made D)the old teaching method is more effective than the new teaching method. 52/The decision to reject the null hypothesis using the Z test is made: A)by comparing the standard deviation of the sample (SD) to the standard deviation of the population B)if the 2 score is greater than +2.5 C)if the 2 score is less than -1 or greater than +1 D)by comparing the 2 score needed to reject the null hypothesis to the actual Z scare of the sample. 54/The reporting of chi-square tests in research articles: A)was emohasized in research articles undi recently B)relies exclusively on tables C)has been downplayed until recently D)almost always includes the information needed to repeat the calculation