If you're seeing this message, it means we're having trouble loading external resources on our website.

If you're behind a web filter, please make sure that the domains *.kastatic.org and *.kasandbox.org are unblocked.

### Course: AP®︎/College Statistics>Unit 2

Lesson 2: Representing a quantitative variable with histograms and stem plots

# Stem-and-leaf plots

We learn how to interpret a stem-and-leaf plot using basketball scores as an example. The video demonstrates how to read the plot, translate it into individual scores, and then use those scores to calculate the team's total points. This method provides a clear view of data distribution and makes it easier to understand the range of scores. Created by Sal Khan.

## Want to join the conversation?

• What are some applications of this? Never seen it used in real life? @ do baseball statisticians use this?
• I've seen it used on a Ferry timetable with the stem having the hours and the leaf having the minutes... Actually gave you a decent sense of the peak running times when there were extra services... at a glance. Then you could look closer and get the exact times.
• Why do you use Stem-and-Leaf Plots? You could just write the numbers the way Sal did when he was explaining it.
• In addition, Stem-and-leaf plots condense the data, so you won't have to list all the numbers. It's easier to find the mean, median, and range, even if the list of numbers is organized least to greatest.
• Can you make a stem and leaf plot using four digit numbers? Example-1,000
• Yes, but you need to have the leaves as single digits so the stems have to be appropriately numbered. For example, you might have values that range from 1105 to 1204. Your stems would have to be 110, 111, 112, 113... 120
• What is the need of stem and leaf plots in our life?
• it is useful if you want to become a statistician or a data-scientist.
• this is really hard i need a strategy to learn this? i need your help!
(1 vote)
• At doesn't he say 9 instead of 7?
• I think Sal had made enough work hours to be allowed to make some mistakes from time to time...
• I’m confused. Can someone explain?
• In a stem and leaf plot the left number is equal to 10 times that number. The right number is equal to 1 times that number
• Where is Sal's key? Generally in a Stem and Leaf Plot, there is a key at the bottom.
• While no key is present in the video, Sal seems to have a key on a separate piece of paper/in his head, the key in particular being, for example, 5|6=56