Question 1048878: Given the following five-number summary, find the IQR.
2.9, 5.7, 10.0, 13.2, 21.1
The answer is 7.5, but how do I get that?
Answer by rothauserc(4718)   (Show Source):
You can put this solution on YOUR website! The IQR is the difference between the third quartile and the first quartile
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minimum is 2.9
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median is the number which half of numbers are below and half of the numbers are above (2.9, 5.7, 10.0, 13.2, 21.1) = 10.0
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first quartile is the median of the data below the overall median = (2.9 + 5.7) / 2 = 4.3
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third quartile is the median of the data above the overall median = (13.2 + 21.1) / 2 = 17.15
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IQR = 17.15 - 4.3 = 12.85
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