Activity 1: Random sample, random assignment, and causal effects. For each of th

Question

Activity 1: Random sample, random assignment, and causal effects. For each of the study descriptions below, answer the following Yes or No questions: Does the study appear to use random sampling? Does the study appear to use random assignment? Would we be able to make cause and effect conclusions based on this study? a. b. c. 1. The students in an intro Chemistry class are asked to complete a survey about study habits. a) c) 2. At a large university, 100 students are randomly selected to take part in a marketing study. Half of these students will be randomly assigned to view one advertising campaign while the other half will watch a different advertising campaign. 3. In a study examining the reaction of mice to alcohol, all 50 mice in a lab will be randomly assigned to ether have alcohol mixed in with their water or to have non-alcoholic liquid of similar taste and caloric content mixed in with their water. a) b) c)

Explanation / Answer

1) The students in an intro Chemistry class are to complete a survey about study habits.

2) At large university 100 students where randomly selected to take part in marketing study , half students where randomly assigned to one group where they viewed advertisement campaign and other half to other group where they viewed other advertisement campaign.

3) In a study to check reaction of mice to alcohol , 50 mice are randomly assigned to either of two groups ; one where alchol is mixed with water and other water mixed with some liquid which tastes like alcohol.

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