The Local Amusement Park Was Interested in the Average Wait

Multiple Choice

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