Download Interquartile Range Example Problems Gallery. It cuts them out of the data set by only focusing on the distance within the middle 50 percent of the data. For example if we had the data sets:

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It is the difference between the two extreme conclusions of the distribution. Add one more 9 to your example and excel will give you a different result. Learn about the interquartile range (iqr), the difference between the first and third quartiles, and see example calculations for the iqr.

For example, it may indicate an anomaly like bank fraud or a rare disease.

1, 3, 4, 5, 5, 6, 7, 11. We define interquartile range as well, if you're into that sort of thing. It tells you something about how spread out the data is (more spread data tends to have larger iqr), but it is insensitive to outliers (particularly compared to say the standard deviation). An example of the iqr calculation can be seen below.