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 stop watch to record the time they spent in line. The times recorded were as follows (in minutes) (mean = 114.15):
118, 124, 108, 116, 99, 120, 148, 118, 119, 121, 45, 130, 118

-What is the standard deviation?
A)103
B)23.62
C)557.97
D)128.8
E)115

Question

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 stop watch to record the time they spent in line. The times recorded were as follows (in minutes) (mean = 114.15):
118, 124, 108, 116, 99, 120, 148, 118, 119, 121, 45, 130, 118

-What is the standard deviation?
A)103
B)23.62
C)557.97
D)128.8
E)115

Quizplus · Accepted Answer

The standard deviation is the square root of the variance. In this case, the variance is given as 558.6, so the standard deviation is the square root of that, which is approximately 23.62. Therefore, the best answer choice is B.

The Local Amusement Park Was Interested in the Average Wait