Find class boundaries, midpoint, and width for the class 18.6-21.0
Solution:
Given the class 18.6-21.0
Upper class boundary = 21.0
Lower class boundary = 18.6
Midpoint = 18.6+21.02=19.8\dfrac{18.6+21.0}2=19.8218.6+21.0=19.8
Width = 21.0 - 18.6 = 2.4
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