How to Find Quartiles (Even Set of Data) | Math with Mr. J

What do quartiles do to a data set?

• Divide it into two equal halves

• Divide it into four equal parts

• Find the average of all numbers

• Identify the most frequent number

What is the first step when finding quartiles for a data set?

• Find the median

• Order the data from least to greatest

• Calculate the average of the numbers

• Identify the largest and smallest numbers

What is the median (Q2) of the data set: 16, 16, 17, 21, 28, 31, 39, 39?

• 21

• 28

• 24.5

• 25

What is the lower quartile (Q1) of the data set: 16, 16, 17, 21, 28, 31, 39, 39?

• 16

• 17

• 16.5

• 21