Answer
The sampling method is flawed.
Work Step by Step
The sample is self-selected which introduces a bias in the results.
Essentials of Statistics (5th Edition)
by Triola, Mario F.
Published by
Pearson
ISBN 10:
0-32192-459-2
ISBN 13:
978-0-32192-459-9
Chapter 1 - Introduction to Statistics - 1-2 Statistical and Critical Thinking - Page 12: 9
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