To find the interquartile range, you first need to find the median (Q2) of the dataset.
11, 13, 14, 15, 17, 21, 22, 27
Median (Q2) = 17
Next, you need to find the median (Q1) of the lower half of the dataset (values below 17):
11, 13, 14, 15
Q1 = 14
Finally, you need to find the median (Q3) of the upper half of the dataset (values above 17):
21, 22, 27
Q3 = 22
The interquartile range is the difference between Q3 and Q1:
IQR = Q3 - Q1
IQR = 22 - 14
IQR = 8
Therefore, the interquartile range of the given dataset is 8.