Q1\

Four professors are teaching large classes in introductory statistics. At the end of the semester, they compare grades to see if there are significant differences in their grading policies. Professor A B C DF W Fridline 12 45 30 10 10 7 Einsporn 20 60 40 30 8 Datta 10 32 43 18 4 12 Hab 19 30 28 9 9 4One hundred fourty two general practitioners attend a health promotion workshop. At the start of the workshop they are asked to indicate whether they are in favour of routinely asking patients about alcohol consumption. They are then shown a video on the health and social problems caused by the excessive consumption of alcoholic drinks. The video is followed by discussion in small groups. After the video and discussion they are asked the original question again. Do the results given below indicate a signicant change in attitudes as a result of the video and group discussion? Before video and Discussion In favour Against After video and djcussion in favour 41 27 Against 16 58