Data was collected for 300 fish from the North Atlantic. The length of the fish (in mm) is summarized in the GFDT below.
Frequency
Lengths (mm)
60 - 62
1
63 - 65
16
66 - 68
71
69 - 71
108
83
72-74
75 - 77
78 - 80
18
3
W
What is the class midpoint for the third class?
class midpoint