Topic: Finding probabilities from a two-way table The following data represents a random sample of boys and girls and how many prefer cats or dogs. Use the information to answer the questions below. Cats | Dogs Total Boys 32 68 100 Girls Total 1. P(B) = 2. P05) = 3. P(C) = 4. P(() = 5. P(ClG) = 6. P(C or B) = 7. P((lB) = 8. P(B n () = 9. If this is a random sample from a school, what total percent of boys in this school do you think would prefer dogs? 10. What percent of students at the school would prefer cats? 11. If you sampled a different 152 students, would you get the same percentages? Explain. 12. What would happen to your percentages if you used a larger sample size? SET Topic: Distinguishing between surveys, observational studies, and experiments For the following scenarios, identify each situation as asurvey, observational study, or an experiment. 13. To determine if a new pain medication is effective, researchers randomly assign two groups of people to use the pain medication in group 1 and a placebo in group 2. Both groups are asked to rate their pain and the results are compared. Need help? Visit www.mgsupportorg