Interquartile Range Worksheet
A Grade 9 math worksheet focusing on understanding and calculating the interquartile range from data sets and box plots.
Includes
Standards
Topics
Interquartile Range Worksheet
Name:
Date:
Score:
Read each question carefully and provide your answer in the space provided. Show all your work for calculation questions.
1. Define the following terms:
a) Lower Quartile (Q1):
b) Upper Quartile (Q3):
c) Interquartile Range (IQR):
2. Calculate the Interquartile Range (IQR) for the following data set:
Data Set: 12, 15, 18, 20, 22, 25, 28, 30, 32
First Quartile (Q1):
Third Quartile (Q3):
Interquartile Range (IQR):
3. The box plot below represents the scores of students on a math test.
a) What is the median score?
b) What is the Interquartile Range (IQR) for this data set?
4. Which of the following statements about the Interquartile Range (IQR) is true?
The IQR is always smaller than the range.
The IQR is not affected by outliers.
The IQR is the difference between the highest and lowest values.
The IQR represents the middle 25% of the data.
5. A company recorded the number of sales made by its employees in a month:
Sales: 10, 12, 15, 18, 20, 22, 25, 30, 35, 40, 50, 80
Calculate the IQR for this data set. Explain what the IQR tells you about the sales data.
Related Worksheets
Scatter Plot Correlation Worksheet
Grade 9 Math worksheet focusing on interpreting and identifying different types of correlation in scatter plots.
Spreadsheet Cell References Worksheet
This worksheet focuses on understanding and using absolute, relative, and mixed cell references in spreadsheets, essential for Grade 9 math students.
Analyzing Graphs Worksheet
A Grade 9 mathematics worksheet focusing on interpreting and analyzing various types of graphs, including bar graphs, line graphs, and scatter plots.
Grade 9 Scatter Plots Worksheet
This worksheet covers interpreting and creating scatter plots, identifying correlations, and drawing lines of best fit for Grade 9 Math students.
Velocity-Time Graphs Worksheet
Explore the concepts of velocity, acceleration, and displacement using velocity-time graphs.
Misleading Graphs Worksheet
Explore how graphs can be manipulated to misrepresent data, focusing on common techniques and their impact.
Grade 9 Graph Features Worksheet
Explore key features of graphs including intercepts, slopes, and types of relationships for grade 9 math students.
Grade 9 Scatter Plot Word Problems
A worksheet for Grade 9 students to practice solving word problems involving scatter plots, interpreting correlations, and making predictions.