The following scores on the midterm exam in Chemistry 102 were recorded:

Question

93 81 59 69 82 73 61 77 95 84 88 71
86 97 63 72 89 80 60 98 91 62 78 83
76 81 94 66 83 96
Find the interquartile range (IQR). I FORGET HOW TO DO THIS

Answer 1

First you need to arrange these numbers in numerical order.

Then study this site.

http://www.childrens-mercy.org/stats/definitions/iqr.htm