10th Grade Interquartile Range Quizzes

Start with an ordered data set and have students locate Q1 and Q3 before introducing IQR = Q3 − Q1. Shade the middle 50% on a box plot so students can see that the interquartile range measures spread, not the overall distance from the minimum to the maximum.

Use a progression of short tasks: order raw data, find Q1 and Q3, calculate the IQR, and identify possible outliers. Follow with problems that ask students to compare two data sets using their box plots and interquartile ranges.

Common errors include finding quartiles before ordering the data, subtracting Q1 from the maximum, and including the median inconsistently when splitting a data set. Ask students to mark the lower and upper halves before calculating Q3 − Q1 so their quartile choices are visible.

Assign a quiz as a digital quiz on Wayground or download the printable PDF for paper practice. Every quiz has a complete answer key, and teachers using print copies can scan or capture student work for grading with the Wayground for Teachers app.

Yes. They support Common Core’s emphasis on summarizing and interpreting quantitative data through measures of spread. Students build from finding quartiles in an ordered data set toward using the IQR and box plots to compare distributions and examine possible outliers.

Give students who need more processing time an extended-time setting, and use reduced answer choices on quartile-identification questions to lower cognitive load. For quiz versions, larger text or wider font spacing can make multi-step data sets easier to track.

Interquartile range is commonly taught in middle school and reinforced in high school statistics. In Grade 10, students typically move beyond calculation to interpreting variability, comparing distributions, and connecting IQR to box plots and outliers.