Data were collected for 331 birds from Indian River County. The wingspan of the birds (in mm) is summarized in the table below.

Wingspan (mm)Frequency80 - 838484 - 87788 - 911792 - 954396 - 9954100 - 10375104 - 10751

What is the class boundary between the sixth and seventh classes?

Class boundary =

What is the lower limit of the third class?

Lower Class Limit =

What is the upper limit of the fifth class?

Upper Class Limit =

What is the midpoint of the second class?

Midpoint