We have a data set, with size n = 7.
The first thing to do is to sort them:
26
52
68
69
90
94
98
Then, we will have a range that is:
[tex]R=\max -\min =98-26=72[/tex]
The first quartile is the limit for the first 25% (or 1/4) of the data. In this case it will include 7/4 = 1.75 values. This can be approximated to 2, so we will take the second value from least to greatest to represent the first quartile. This value is 52.
Then Q1 = 52.
The third quartile is the limit that include 75% of the data below its value. In this case it would corre
