Box and Whisker Plot Worksheets
Printable statistics practice for reading quartiles, building five-number summaries, and comparing data spreads.
Read the Box and Whisker Plot
Use the plot and five-number summary to answer each question.
| Minimum | Q1 | Median | Q3 | Maximum |
|---|---|---|---|---|
| 18 | 24 | 31 | 38 | 47 |
1. What is the median number of reading minutes?
2. What is the interquartile range?
3. What is the total range?
4. Which half of the data has the wider spread?
Build a Box and Whisker Plot
Order the data, find the five-number summary, and draw a box plot on the number line.
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| Minimum | Q1 | Median | Q3 | Maximum |
|---|---|---|---|---|
Compare Two Box Plots
Compare the medians, ranges, and IQRs for two classes.
| Group | Median | IQR | Range |
|---|---|---|---|
| Class A | 25 | 16 | 32 |
| Class B | 32 | 16 | 36 |
1. Which class has the greater median?
2. Which class has the greater interquartile range?
3. Which class has the greater total range?
4. Which class is more spread out overall?
IQR and Outlier Check
Use Q1, Q3, and IQR to decide whether the largest value is an outlier.
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| Minimum | Q1 | Median | Q3 | Maximum |
|---|---|---|---|---|
| 4 | 8 | 11 | 14 | 30 |
IQR = Q3 - Q1. Outlier fence: below Q1 - 1.5 x IQR or above Q3 + 1.5 x IQR.
1. What is the IQR?
2. What is the upper outlier fence?
3. Is 30 an outlier? Explain.