At a meeting of information systems officers for regional offices of a national company, a survey was taken to determine the number of employees the officers supervise in the operation of their departments, where X is the number of employees overseen by each information systems officer and f is the frequency.
X f
1 7
2 5
3 11
4 8
5 9
a) Referring to the table, how many regional offices are represented in the survey results?
I think it's the sum of the f-column. 7 information systems officers are overseeing only 1 employee, 5 are overseeing 2 employees, etc.
So the total number of information system officers in this survey is the sum of the f-column, or 40.