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  4. Exercise : Find the first and third quartile and determine the interquartile range

Find the first and third quartile and determine the interquartile range Statistics & Probabilities

Find the interquartile range of the following sets of data.

Value Frequency
1 3
2 4
3 3
4 7
5 2
6 3
7 3
8 4

8, 9, 1, 1, 54, 7, 3, 2, 5, 9, 2, 4, 1, 5, 3

{5, 2, 6, 8, 9, 1, 4, 4, 2, 6, 6, 7, 1, 9}

6, 4, 1, 1, 7, 3, 9, 2, 4, 5, 6, 2, 1

Value Frequency
1 5
2 2
3 6
4 2
5 7
7 3
11 3
15 2
Value Frequency
2 13
3 2
4 6
6 7
7 2
8 8
10 4
12

8
16 3
18 2
20 4
Value Frequency
5 1
6 4
8 5
11 1
14 1
15 1
16 2
17 1