An instructor is teaching three sections of Introductory Psychology, each section covering the same material. She has made up a different Final exam for each section, but she suspects that one of the versions is more difcuit than the other two She decides to conduct an experiment to evaluate the difcuity of the exams. During the review period, just before nals, she randomly seiects ve volunteers from each class. Class 1 volunteers are given version 1 of the exam; class 2 volunteers get version 2, and class 3 volunteers receive version 3. Of course, all volunteers are sworn not to reveal any of the exam questionsI and aiso, of course, all of the volunteers will receive a different nal exam from the one they took in the experiment. The foliowing are the results. 73 97 92 89 77 78 83 77 BO 85 79 92 ?5 68 78 Using a = 0.05, what do you conclude? (a) Fill in the missing values. (b) what is the value of Fm-t? Assume the IQ scores of the students at your university are normaliy distributed, with .u = 117 and (I = 8. If you randomly sample one score from this distribution, what is the probability that it wiil be (a) Higher than 130? |:| (b) Between 110 and 125? |:| (c) Lower than 100? |:|