1. Find the lower and upper quartiles for the data set.
Order the data from least to greatest.
Find the median.
Find the median of the lower half – lower quartile
Find the median of the upper half – upper quartile
A. 25, 38, 66, 19, 91, 47, 13
Order the values.
lower quartile: 19
upper quartile: 66

2. Find the lower and upper quartiles for the data set.
Order the data from least to greatest.
Find the median.
Find the median of the lower half – lower quartile
Find the median of the upper half – upper quartile
B. 45, 31, 59, 49, 49, 69, 33, 47
Order the values.
lower quartile: = 39 2
upper quartile: = 54 2

3. Use the given data to make a box-and-whisker plot.
Example
Use the given data to make a box-and-whisker plot.
21, 25, 15, 13, 17, 19, 19, 21
Step 1. Order the data from least to greatest. Then find the minimum, lower quartile, median, upper quartile, and maximum.
minimum: 13
maximum: 25
lower quartile: = 16 2
upper quartile: = 21 2
median: = 19 2

4. Step 2. Draw a number line and plot a point above each value from Step 1.

5. Step 3. Draw the box and whiskers.

6. Use the given data to make a box-and-whisker plot.
Try It Out!
Use the given data to make a box-and-whisker plot.
31, 23, 33, 35, 26, 24, 31, 29
Step 1. Order the data from least to greatest. Then find the minimum, lower quartile, median, upper quartile, and maximum.
minimum: 23
maximum: 35
lower quartile: = 25 2
upper quartile: = 32 2
median: = 30 2

7. Use the given data to make a box-and-whisker plot.
Step 2. Draw a number line and plot a point above each value.

8. Use the given data to make a box-and-whisker plot.
Step 3. Draw the box and whiskers.
Step 2. Draw a number line and plot a point above each value.

9. Find the lower and upper quartiles for each data set.
48, 52, 68, 32, 53, 47, 51
lower = 47; upper = 53

10. Use the following data
91, 87, 98, 93, 89, 78, 94
Make a box-and-whisker plot.