The local amusement park was interested in the average wait time at their most popular roller coaster at the peak park time (2 p.m.). They selected 13 patrons and had them get in line between 2 and 3 p.m. Each was given a stopwatch to record the time they spent in line. The times recorded were as follows (in minutes). 118, 124, 108, 116, 99, 120, 148, 118, 119, 121, 45, 130, 118
What are the lower and upper limits of a box-and-whiskers display of this data?
A) 80.5, 154.00
B) 108.5, 128.5
C) 127.75, 138.25
D) 143.50, 154.00
E) 15.75, 31.50

Question

Quizplus · Accepted Answer

Lower limit: Q₁ − 1.5 IQR; upper limit: Q₃ + 1.5 IQR; 116 − (1.5 × 5) = 108.5 for the lower limit, and 121 + (1.5 × 5) = 128.5 for the upper limit.

The Local Amusement Park Was Interested in the Average Wait