Introductory Statistics 9th Edition

Published by Wiley
ISBN 10: 1-11905-571-7
ISBN 13: 978-1-11905-571-6

Chapter 1 - Self-Review Test - Page 28: 12

Answer

a. These are not a random sample. b. 10 pigs are not representative of the entire population, because they are not selected randomly. As a result, there occurs to be selection error in which many pigs are not included in the study and this may cause the sample results to be different from the population results. c. It is a convenience nonrandom sample. d. The sample of 10 pigs is selected in a random manner in which they have the same probability of being selected.

Work Step by Step

a. These are not a random sample. b. 10 pigs are not representative of the entire population, because they are not selected randomly. As a result, there occurs to be selection error in which many pigs are not included in the study and this may cause the sample results to be different from the population results. c. It is a convenience nonrandom sample. d. The sample of 10 pigs is selected in a random manner in which they have the same probability of being selected.
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