What are the minimum first quartile median third quartile and the maximum of the data set? 9,20,4,18,4,18,20,9

First we need to put the numbers in order

4,4,9,9,18,18,20,20

minimum (lowest number) = 4

maximum (highest number) = 20

Q1 = (9 + 4) / 2 = 13/2 = 6.5

Q2 (median) = (18 + 9) / 2 = 27/2 = 13.5

Q3 = (18 + 20) / 2 = 38/2 = 19