Not necessarily. They could be constantly ever so lightly above the average value, but then once in a while, a really low value comes along and drags the average down. What you're thinking of is the median.
Easily achievable if you only take calls in working hours. Then all working hours will have more than average calls per hour for a day.
You can also continously have above average per worked hour for the staff if you keep firing people, because then calls per person keeps going up
Maybe they're taking the average for each day over the whole 24 hours, but the call centre only operates from 9:30-4:30.
downpunxx@fedia.io to 
Not necessarily. They could be constantly ever so lightly above the average value, but then once in a while, a really low value comes along and drags the average down. What you're thinking of is the median.
Easily achievable if you only take calls in working hours. Then all working hours will have more than average calls per hour for a day.
You can also continously have above average per worked hour for the staff if you keep firing people, because then calls per person keeps going up
Maybe they're taking the average for each day over the whole 24 hours, but the call centre only operates from 9:30-4:30.
Yeah, like at night it falls down to 0