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Tag Archives: Completely Randomized Experimental Design
Learning from bad experiments
Thinking about bad experiments is a good device helping reinforce the concepts of experimental design. No one should deliberately perform an experiment with a defective design. However, thinking about such designs is a great learning device. For example, why does … Continue reading
Posted in Observational Studies, Randomized Experiments, Statistical studies, Statistics
Tagged Completely Randomized Experimental Design, Confounding, Double blind, Experiments, Introduction to statistics, Introductory statistics, Lurking variables, Observational studies, Placebo, Randomized Experiments
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Thinking about study designs
When learning the designs of research studies, an effective exercise is to look at examples drawn from actual research studies. In this post, we present a series of eight research studies. For each study, the exercise is to classify each … Continue reading
Design of experiments
When the goal in a statistical study is to understand cause and effect, experiments are the only way to obtain convincing evidence for causation. This is an introductory discussion on experimental design, introducing its vocabulary, its characteristics and its principles. … Continue reading
Posted in Randomized Experiments, Statistical studies, Statistics
Tagged Completely Randomized Experimental Design, Confounding, Correlation, Double blind, Experiments, Introduction to statistics, Introductory statistics, Lurking variables, Observational studies, Placebo, Randomized Experiments
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A Landmark Lipitor Study of Patients with Type 2 Diabetes
People with diabetes are at high risk for heart disease and stroke. Since elevated lipid levels are associated with cardiovascular vascular disease, keeping blood cholesterol close to the recommended target numbers can lower the risk. The American Diabetes Association has … Continue reading