Stem-and-leaf Plots

In a stem-and-leaf plot, the data are organized from least to greatest. The digits of the least place value usually form the leaves, and the next place-value digits form the stems.

The number of minutes the students in Mr. Smith's class spent doing their homework one night is shown. Display the data in a stem-and-leaf plot.

Homework Time (min)
22	5	35	30	16
27	1	24	25	21
36	23	39	30	29
18	25	25	15	35

Step 1	Choose the stems using digits in the tens place, 0, 1, 2, and 3. The least value, 1, has 0 in the tens place. The greatest value, 39, has 3 in the tens value.

Step 2	List the stems from least to greatest in the Stem column. Write the leaves, the ones digits to the right of the corresponding stems.

Step 3	Order the leaves and write a key that explains how to read the stems and leaves. Include a tittle.

The stem-and-leaf plot shows the number of chess matches won by a member of the Main Street Middle School Chess Team. Find the median of the data.

Chess Matches Won

Stem	Leaf

2	1	1	3	8
3	0	1	3	5	7	7	8
6	2	3	3	8	9
7	1	1	9

3|3 = 33 wins

Median =