Elementary Statistics (12th Edition)

Published by Pearson
ISBN 10: 0321836960
ISBN 13: 978-0-32183-696-0

Chapter 4 - Probability - 4-3 Addition Rule - Basic Skills and Concepts: 9

Answer

Disjoint.

Work Step by Step

Two events are disjoint if they cannot happen at the same time. Here, the result 'false negative' means that the result was incorrect because the person was a drug user. Therefore a non drug-user cannot get 'false negative'. Therefore these events are disjoint.
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