The document provides the solution to finding the range, interquartile range, and median of a data set containing the numbers 11, 18, 5, 25, 1, 21, 17, 14, 16, 13, 5, 20, 9, 8. It lists the data, sorts it, calculates the median as 13.5, finds the first and third quartiles to be 8 and 18, and determines the interquartile range is 10 and the range is 25-1=24.

1. Find the range and interquartile range and median of the following data set.
11, 18, 5, 25, 1, 21, 17, 14, 16, 13, 5, 20, 9, 8
Solution
11, 18, 5, 25, 1, 21, 17, 14, 16, 13, 5, 20, 9, 8
1, 5, 5, 8, 9, 11, 13, 14, 16, 17, 18, 20, 21, 25
14/2=7
median:(13+14)/2=13.5
inter quartile range:14*0.25=3.5==>Q1=8==>14*0.75=10.5==>Q3=18
Q3-Q1=10