1) We gather college students to see if their use of caffeine helps them stay more alert during classes. We randomly assign half the students to drink a caffeinated drink in the morning, and the control group drinks only water in the morning. During their 90 minute morning class, we measure how many minutes they stayed alert generating an alertness score that ranges from 0 to 90. The higher the score, the more "alert" they were during class. 2) It is said that having to-clo lists can help individuals stay organized with their time thus creating lower stress levels. We gather a sample of students during their very first semester at a community college. We suppiy them a to-do list for getting through week in the middle of the semester and ask them to mark down their stress levels during that week, as well as marking down their stress levels during a week in which they do NOT use a to-do list. Higher scores mean higher stress levels. CHOOSE ONE T-TEST YOU WOULD LIKE TO COMPLETE SCENARIO SCENARIO 1 "Independent" 2 "Dependent" Caffein Grou Alertnes Student Student "to do" "to do" e p S YES NO Yes 63 A 100 120 Yes 72 B 130 142 Yes 63 C 101 120 Yes 62 D 106 115 Yes 67 E 123 135 Yes 55 F 111 119 Yes 62 G 109 120 Yes 64 H 112 125 Yes 45 88 99 Yes 58 112 120 No 54 K 105 118 No OOOOOO OO OO P PP PP PP 61 L 110 116 No 53 M 99 105 No 55 N 106 116 No 46 O 83 95 No 48 No 60 No 51 No 62 No 50