Statistics (12th Edition)

Published by Pearson
ISBN 10: 0321755936
ISBN 13: 978-0-32175-593-3

Chapter 1 - Statistics, Data, and Statistical Thinking - Exercises 1.1-1.33 - Understanding the Principles - Page 18: 1.4


Four methods of collecting data: 1. A designed experiment: Usually involves exerting full control over the characteristics of the experimental units sampled. 2. An observational study: Experimental units sampled are observed in their natural setting. 3. A representative sample: exhibits characteristics typical of those possessed by the target population. 4. A random sample: every different sample of size n has an equal chance of selection.

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