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MCQ
For the classes 10-19, 20-29, 30-39, the lower class boundary of the class 20-29 is:
Unit-11 Basic Statistics
A 19.5
B 20
C 20.5
D 29.5
Explanation

The classes are continuous, so the lower boundary of 20-29 is the midpoint of 19 and 20, which is 19.5.

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