From an ogive, the lower quartile is estimated to be 24 kg and the upper quartile is estimated to be 41 kg. What is the interquartile range?

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Question

From an ogive, the lower quartile is estimated to be 24 kg and the upper quartile is estimated to be 41 kg. What is the interquartile range?

Accepted Answer

B. 17 kg — The interquartile range = Q3 − Q1 = 41 − 24 = 17 kg. A common error is to add Q1 and Q3 (giving 65) or to find their average (32.5) rather than their difference.

Answer

D. 32.5 kg

Answer

A. 24 kg

Answer

C. 65 kg

Answer

B. 17 kg

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