Question

Please Help!!! Calculate the interquartile range for this set of data: {34, 47, 1, 15, 57, 24, 20, 11, 19, 50, 28, 37}


A) 21
B) 23
C) 25
D) 27

Answer 1

Let's put it in order.
1, 11, 15, 19, 20, 24, 28, 34, 37, 47, 50, 57
Let's split it in half.
1, 11, 15, 19, 20, 24║28, 34, 37, 47, 50, 57
            17                                  42
42-17
25 
The IQR is C) 25.