Question

For each data set listed, determine the requested values.

1. 72, 32, 74, 66, 71, 45, 38, 49, 66, 69, 75, 34, 102

Answer 1

put the numbers in order

32,34,38,45,49,66,66,69,71,72,74,75,102

Q1 = (38 + 45)/2 = 41.5

Q2 (the median) = 66

Q3 = (72 + 74)/2 = 73

Interquartile range (IQR) = Q3 - Q1 = 73 - 41.5 = 31.5