Statistics: Informed Decisions Using Data (4th Edition)

Published by Pearson
ISBN 10: 0321757270
ISBN 13: 978-0-32175-727-2

Chapter 1 - Section 1.5 - Assess Your Understanding - Applying the Concepts - Page 44: 35g

Answer

The sample might not be representative of the population (all users of the road).

Work Step by Step

If the surveyors sample the local population, the result will be different if the surveyors sample visitors. Systematic sampling is a good solution.
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