Chapter_1_Seven_Statistical_Principles - population 5...

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Chapter 1: Mind on Statistics Seven Important Statistical Principles (Page 8 from the Textbook) 1. Simple summaries of data can tell an interesting story and are easier to digest than long lists. 2. When discussing the change in the rate or risk of occurrence of something make sure you also include the base rate of baseline rate. 3. A representative sample of only a thousand, or perhaps even a few hundred, can give reasonably accurate information about a population of many millions. 4. An unrepresentative sample, even a large one, tells you almost nothing about a
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Unformatted text preview: population. 5. Cause-and-effect conclusions can not generally be made on the basis of an observational study. 6. Cause-and-effect conclusions can generally be made on the basis of randomized experiments. 7. A statistically significant finding does not necessarily have practical significance or importance. When a study reports a statistically significant finding, find out the magnitude of the relationship or difference....
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