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Question

The weight(in kg) of 13 students in a class are 42.5,47.5,48.6,50.5,49,46.2,49.8,45.8,43.2,48,44.7,46.9,42.4. Find the range and coefficient of range.

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Solution

Let us arrange the given data in the ascending order.
42.4,42.5,43.2,44.7,45.8,46.2,46.9,47.5,48,48.6,49,49.8,50.5
From the given data, the largest value L=50.5 and the smallest value S=42.4
Range=LS
=50.542.4=8.1
The coefficient of range=LSL+S=50.542.450.5+42.4=8.192.9
=0.087

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