Based on the data on the family of bears going to watch a movie, the interquartile range of the data set is 3.5.
What is the interquartile range?
First, find the value of Q1:
= (n + 1 ) / 4
= (9 + 1) / 4
= 2.5th observation which is 2.
The value of Q3:
= 3 (n + 1) / 4
= 3 (9 + 1) / 4
= 7.5th observation which is 5.5.
The interquartile range is therefore:
= 5.5 - 2
= 3.5
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