Question: A frequency distribution is shown below Class interval 1-20 21-40 41-60 61-80 81-100 Frequency (f) 5 10 15 12 8 Work out the interquartile range.

A frequency distribution is shown below Class interval 1-20 21-40 41-60 61-80 81-100 Frequency

(f) 5 10 15 12 8 Work out the interquartile range.

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