Question

What is the five number summary of the following data set? Write the numbers separated by commas. 45, 8, 51, 47, 31, 45, 12, 55, 48

Answer 1

First order the numbers from least to greatest.
8,12,31, 45, 45,47, 48, 51,55
Min: 8
Q1: 21.5
Q2: 45
Q3: 49.5
Max: 55

To find Q1 find the average of the lower half. (12 + 31)/2
43/2 = 21.5
To find Q3 find the average of the upper half.
(48+51)/2= 49.5