b. In a study on memory, participants completed a memory task once each week for 4 weeks\--twice after sleeping 8 hours and twice after sleeping 4 hours. In each sleep condition, the participants completed the task after ingesting a caffeinated beverage and again, on another day, after ingesting a \"placebo\" beverage that they were told contained caffeine.\n\nC. A study examined the impact of students' Instagram profiles on numbers of Instagram friends. The researchers were interested in the effect of (1) the profile photo\--either an identifiable photo of the student or a photo of someone or something else (e.g., a dog)\--and (2) bio length\--either short (fewer than 75 characters) or long (75 characters or more).\n\n2. Researchers gathered reports of underage drinking in one particular weekend at different universities. Universities are coded as \"dry\" meaning that alcohol use is prohibited or \"wet\" meaning that alcohol use is allowed after age 21. They are also coded as state schools or private schools. Use these data below and run the appropriate analysis in SPSS. Report and explain the results.\n\"Dry\" campus, state school: 47, 52, 27, 50\n\"Dry\" campus, private school: 25, 33, 31\n\"Wet\" campus, state school: 77, 61, 55, 48\n\"Wet\" campus, private school: 52, 68, 60
