The Test Scores of 19 Students Are Listed Below

Multiple Choice

The test scores of 19 students are listed below.Find the interquartile range (IQR) by hand. 91 47 86 70 59
64 97 55 90 78
82 83 50 88 75
43 92 94 67

A) 25
B) 31.5
C) 31
D) 30.5
E) 27.5