Essentials of Statistics (5th Edition)

Published by Pearson
ISBN 10: 0-32192-459-2
ISBN 13: 978-0-32192-459-9

Chapter 4 - Probability - 4-3 Addition Rule: 11

Answer

Disjoint.

Work Step by Step

Two events are disjoint if they cannot happen at the same time. False negative means that someone is a drug user, but got a negative result. Therefore it is not possible to get false negative if not using drugs. Therefore, these events are disjoint.
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