Quartiles Worksheet
A Grade 7 math worksheet focusing on understanding and calculating quartiles, interquartile range, and interpreting data distributions.
Includes
Standards
Topics
Quartiles and Data Analysis
Name:
Date:
Score:
Read each question carefully and follow the instructions. Show your work where necessary.
1. What are quartiles in statistics, and how many are there?
2. The first quartile (Q1) is also known as the percentile.
3. The second quartile (Q2) is the same as the .
4. The third quartile (Q3) represents the percentile.
5. The interquartile range (IQR) is the difference between the maximum and minimum values in a data set.
True
False
6. For the data set: 12, 15, 18, 20, 22, 25, 28, 30, 32, find the following:
a) Median (Q2):
b) First Quartile (Q1):
c) Third Quartile (Q3):
d) Interquartile Range (IQR):
7. Which of the following describes the middle 50% of a data set?
Range
Mean
Interquartile Range
Mode
8. A student scored the following on their math tests: 78, 85, 92, 70, 88, 95, 80. Calculate the three quartiles for this student's scores.
Q1:
Q2:
Q3: