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A statistics student records the number of hours she spends studying during each of nine consecutive weeks: 6.2 5.0 4.3 7.4 5.8 7.2 8.4 1.2

A statistics student records the number of hours she spends studying during each of nine consecutive weeks: 6.2 5.0 4.3 7.4 5.8 7.2 8.4 1.2 6.3 What is the interquartile range (IQ) for these data

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