Answer
No, it is not an outlier.
Work Step by Step
$IQR=Q_3-Q_1=10.06-6.12=3.94$
$Lower~fence=Q_1-1.5\times3.94=0.21$
$Upper~fence=Q_3+1.5\times3.94=15.97$
Since 1.31 is between the lower fence and the upper fence, it is not an outlier.
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 3 - Section 3.4 - Assess Your Understanding - Applying the Concepts - Page 172: 24b
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