5, 6, 7, 8, 9, 10, 11 what is the interquartile range of the data set?

The IQR = 4.

Step-by-step explanation:

The median is the middle number so it is 8.

The lower quartile is 6  (the middle number of those less than 8).

In a similar way the upper quartile is 10.

The interquartile range is 10 - 6 = 4.

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