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Chapter 5: Producing Data

Chapter 5: Producing Data. Section 1: Designing Samples Section 2: Designing Experiments Section 3: Simulating Experiments. Section 2: Designing Experiments. Basic Terms. Observational Studies Experiments – where treatments are imposed Subjects / Experimental units Placebo.

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Chapter 5: Producing Data

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  1. Chapter 5: Producing Data Section 1: Designing Samples Section 2: Designing Experiments Section 3: Simulating Experiments

  2. Section 2: Designing Experiments

  3. Basic Terms • Observational Studies • Experiments – where treatments are imposed • Subjects / Experimental units • Placebo

  4. 3 Principles of Experimental Design 1. Control the lurking variables. 2. Randomly assign treatments to the experimental units. 3. Replicate each treatment on many units to reduce chance variation in the results.

  5. Experimental Design • Factors • Levels • Treatments

  6. Statistically significant – an observed effect that is too large to be reasonably attributed to chance • Blind and double-blind experiments • “Lack of realism”

  7. Types of designs • Completely randomized experiment • Matched pairs design • Block design

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