The average lateness for one of the top airline companies is 10 minutes. The variance of the lateness measure is calculated as 9.

255

What is the smallest percentage spent on R&D?

5.9

5.6

5.2

5.02

50.2

3.In a hearing test, subjects estimate the loudness (in decibels) of a sound, and the results are (mean = 70): 68, 67, 70, 71, 68, 75, 68, 62, 80, 73, 68.

What is the standard deviation?

18

4.73

22.40

324

6.76

4.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 is the 65th percentile?

99

120

130

112

45