Answer:
Size of interval is 2 minutes
Explanation:
Minimum value in the histogram is 2.30 and highest is 8.00, we can see from the data that from 2 - 4 there is only two values as 2.30 and 3:45 means 2 frequency further from 8 - 10 only one value as 8.00 means 1 frequency.
Thus, it concluded that the intervals are given as :
0 - 2
2 - 4
4 - 6
6 - 8
8 - 10
In this range first value is inclusive only.