Lesson 11: Design of Experiments
October 5, 2016
Wed, Oct 5
Review:
- Exam 1 Results
- Make-up due Mon, Oct 10
Presentation:
- Design of Experiments
- Explanatory variables
- Response variable
- Subjects – objects or participants in experiment
- Treatments – experimental conditions
- Example
- Explanatory variables
- Exam 1 Part 1 begin day/time
- Hours of sleep night before exam
- Response variable:
- Exam 1 Score
- Subjects
- Students
- Treatments
- Open book vs Closed book
- Written vs Multiple Choice
- Morning vs Afternoon
- Explanatory variables
- Experimental Design Principles
- Comparison of Treatments
- Placebo effect
- Control group
- Randomize assignments
- Bias
- Double-blind
- Repetition
- Limit impact of individual observations
- Confirm hypotheses
- Comparison of Treatments
- Design of Experiments video
Activity:
- Divide into groups
- Read and discuss Example 3.7 on p. 178
- Read and discuss Exercise 3.19 on p. 192-193
- Design an experiment
- Response variable = Exam 2 Test Scores (yes, the exam you will take)
- Subjects = Students in Inferential Statistics
- Explanatory variables
- What data elements could be measured or collected?
- Treatments
- What treatments could be implemented?
- Submit written description of your groups Experimental Design
- How will treatments be compared?
- How can treatments be randomly assigned to subjects?
- How can the experiment avoid bias?
- Include team member names
Assignment:
- Read pp. 178-192, Design of Experiments
