CHOICES: Simple Random Sampling Systematic Random Sampling Stratified Random Sampling Quota Sampling Convenience Sampling (Reliance on Available Participants) Snowball Sampling Four of the choices will match with the four scenarios. You will have two remaining that do not match. Directions. For each scenario, answer each question on the right (random selection, control group, etc.) so that you can determine what the correct design is. On the left-hand side, write down the correct design. Each choice occurs once, none occur twice. 1.) BOB wants to interview drug dealers about the initial contact they make with potential clients. Knowing this is a hard population to access, BOB knows he is going to have to gain the trust of one drug dealer and then see if that drug dealer will help them get in contact with another drug dealer to interview. This is an example of what sampling technique? Sampling Technique: Probability Sampling ___Yes ___No Technique? ____________________________________ 2.) JANE decides to conduct a study looking at Atlanta Craigslist personal ads to see how common terms-of-service violations are. When she pulls up the Atlanta Craigslist personal ads, she sees that there are over 2000. Therefore, she decides to take a sample of them. She wants her sample to be representative, so she picks a random place on the first page and then picks every fifth personal ad, which gives her a sample of 400 personal ads. This is an example of what kind of sampling technique? Sampling Technique: Probability Sampling ___Yes ___No Technique? ____________________________________ 3.) Professors BOB and JANE are conducting a study at the University of Nada to see how involvement in student activities is related to binge drinking. The university's student population is 5,000 students. They want a sample of approximately 10% of students (or around 500 students). BOB and JANE want to make sure their sample is representative and that sex match that of the full student population. They know that the university's student population is 40% male and 60% female. Therefore, they randomly select 200 males from the male student population and 300 females from the female student population, so that the make-up of their sample's sex matches that of the population (40% males and 60% females). This is an example of what kind of sampling technique? Sampling Technique: Probability Sampling ___Yes ___No Technique? ____________________________________ 4.) JANE is evaluating how effective New Life, a drug treatment program is at reducing long-term drug use. She discovers that in the past five years they have had 500 clients successfully complete their program. JANE decides she will try to interview 25 of those who have gone through the program. Tony, the program coordinator informs Jane that some of the more recent clients are coming in for a support group, and he can ask them if they would be willing to be interviewed. While this may not be representative of all the clients of the program, Jane decides that it is less costly and more convenient to recruit participants this way. This is an example of what kind of sampling technique? Sampling Technique: Probability Sampling ___Yes ___No Technique? ____________________________________