Posted by JEN on .
The following scores on the midterm exam in Chemistry 102 were recorded:
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

MATH 
Ms. Sue,
First you need to arrange these numbers in numerical order.
Then study this site.
http://www.childrensmercy.org/stats/definitions/iqr.htm