Answer
No, It is not an unusual event.
Work Step by Step
20 is less than 2 standards deviations (3.81) greater than the mean (15).
Statistics: Informed Decisions Using Data (4th Edition)
by Sullivan III, Michael
Published by
Pearson
ISBN 10:
0321757270
ISBN 13:
978-0-32175-727-2
Chapter 7 - Section 7.4 - Assess Your Understanding - Applying the Concepts - Page 393: 28b
Update this answer!
You can help us out by revising, improving and updating this answer.
Update this answerAfter you claim an answer you’ll have 24 hours to send in a draft. An editor will review the submission and either publish your submission or provide feedback.
