Problem # 4 ( 20 pts). Make sure you show your work, or you lose 20 pts). The following frequency distribution table represents the daily commuting times (in minutes) from home to work for all 30 employees of a company. A) Find the mean, and the standard deviation of the frequency distribution table.
Daily Commuting Time (min) | # of Employees | Midpoints | Boundaries | cumulative Frequency
0-10 | 4 | | |
11-21 | 9 | | |
22-32 | 6 | | |
33-43 | 4 | | |
44-54 | 2 | | |
55-65 | 4 | | |
66-76 | 1 | | |
b) Construct an ogive