ShmoopTube

Where Monty Python meets your 10th grade teacher.

Search Thousands of Shmoop Videos


Statistics and Probability Videos 134 videos

SAT Math 1.2 Statistics and Probability
1060 Views

SAT Math: Statistics and Probability Drill 1, Problem 2. If the four largest numbers in the set were doubled, what would happen to the median...

SAT Math 1.4 Statistics and Probability
380 Views

SAT Math 1.4 Statistics and Probability. If two standard 6-sided dice are rolled, what is the probability that the sum of the dice will be gre...

SAT Math 1.5 Statistics and Probability
358 Views

SAT Math 1.5 Statistics and Probability. If Silas draws one card, then places it in his pocket and draws another, what is the probability that...

See All

Stem and Leaf Plots 8803 Views


Share It!


Description:

This video covers how to set up a stem and leaf plot and use it to find the mean and median of a set of numbers.

Language:
English Language

Transcript

00:04

Stem and Leaf Plots, a la Shmoop. Kathryn R. Pillar lives on a plant stem.

00:11

Don't ask us why, but she insists on arranging all her leaves into stem-and-leaf plot formations

00:15

before she eats them. However, every time there's wind, her leaves

00:20

get blown out of sequence. Here are the leaves, by number:

00:28

Okay... before we get started... what in the world is a stem-and-leaf plot?

00:32

It's basically a way of organizing data that shows the relationship of each value to the

00:37

other values. To make a stem-and-leaf plot, create the "stem"

00:42

by listing the digits with the largest place value to the left of a vertical line.

00:47

In this case, we have the tens place...5 for 50, 4 for 40, 3 for 30, and 2 for 20.....

00:55

The remaining digits... those in the ones place...

00:58

...will be written to the right of the vertical line to create and organize the "leaves."

01:04

Now that Kat has finished organizing, she decides that she wants to eat the middle leaf

01:07

first. To find the middle leaf, also known as the

01:12

median... ... we can simply cross out one number from

01:14

the top and bottom until we reach the middle number.

01:17

Unfortunately, Kat has found that the median lands between 47 and 45.

01:22

She doesn't have a leaf labeled "46".. ...so she settles for the next best thing...

01:28

the leaf with the average value. To find the average, or mean, we just have

01:33

to add up the numerical values of all the leaves...

01:36

... and divide by the total number of leaves. All of them added together equals 760. When

01:43

we divide that by the total number of leaves... 18... it gives us roughly 42.2.

01:50

Finally, Kat can lie down and try to sleep off her food coma.

Related Videos

SAT Math 6.1 Geometry and Measurement
3974 Views

SAT Math 6.1 Geometry and Measurement

CAHSEE Math 3.4 Statistics, Data, and Probability I
363 Views

Statistics, Data, and Probability I: Drill Set 3, Problem 4. How many different avatars can be created based on the given options?

CAHSEE Math 3.2 Statistics, Data, and Probability II
224 Views

Statistics, Data, and Probability II Drill 3 Problem 2. Which two sports together make up for the preferences of more than half of all those w...

CAHSEE Math 3.3 Statistics, Data, and Probability II
198 Views

Statistics, Data, and Probability II Drill 3 Problem 3. One hundred twenty of those who were asked preferred what sport?

Pre-Algebra: Sampling Methods
1865 Views

If you're looking for tips on how to score more free samples at Yogurtland, you've got the wrong video.