33. Dr. Symth was interested in students' behavior following alcohol consumption. He observed students at bars and parties and studied the ways that students acted before and after consuming alcohol. Which research method did Dr. Symth utilize? A. Controlled experiment B. Case study C. double-blind experiment. D. Observational Experiment 34. A sample taken from the larger population in such a way as to give every member of the population has an equal chance of being chosen is called a: A Cluster Sample. B Convenience Sample. C Simple Random Sample. D Stratified Sample. E Good Sample 35. The main property of a simple random sample is:- A. The people that are picked for the sample are easy to choose. B. Every member of the population has an equal chance of being picked for the sample. C. The people in the sample don't know if they are in the control or experiment group. D. The people in the sample choose themselves by simply volunteering. 36. A "double blind experiment" is normally done in clinical trials because. A. It is the best method to make sure that the data collected is unbiased. B. It is the cheapest way to conduct a survey. C. The people who are in the sample can't sue the doctor if the treatment fails. D. This is the simplest way to get the sample