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Question

The weights of newborn babies (in kg) in a hospital on a particular day are as follows:
2.3,2.2,2.1,2.7,2.6,3.0,2.5,2.9,2.8,3.1,2.5,2.8,2.7,2.9,2.4
(i) Determine the highest weight.
(ii) Determine the lowest weight.
(iii) Determine the range.
(iv) How many babies weigh below 2.5 kg?

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Solution

Let us arrange the weights in descending order:
3.1, 3.0, 2.9, 2.9, 2.8, 2.8, 2.7, 2.7, 2.6, 2.5, 2.5, 2.4, 2.3, 2.2, 2.1
(i) Highest weight: 3.1 Kg.
(ii) Lowest weight: 2.1 Kg.
(iii) Range = Maximum observation – Minimum observation
= (3.1-2.1) kg
= 1.0 Kg.
(iv) 4 babies weigh below 2.5 kg.

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