http://www.ck12.org Chapter 5. Measures of Central Tendency
5.4 Median
Here you’ll learn how to determine the median of a set of numerical data when there is an odd number of values and
an even number of values in real-world contexts. You’ll also learn why it is better to use the median than the mean
as a measure of central tendency when there are outliers in a set of data.
Here are the temperatures you recorded for the last fifteen days in degrees Fahrenheit: 25, 55, 65, 60, 10, 52, 61,
58, 53, 67, 61, 63, 64, 59, 47. What measurement would you use to describe a representative temperature over those
fifteen days?
Watch This
First watch this video to learn about the median.
MEDIA
Click image to the left for more content.CK-12 Foundation: Chapter5MedianA
Then watch this video to see some examples.
MEDIA
Click image to the left for more content.CK-12 Foundation: Chapter5MedianB
Watch this video for more help.
This video from Khan Academy shows how to calculate the mean, median, and mode of a data set.
MEDIA
Click image to the left for more content.Khan Academy Average or Central Tendency: Arithmetic Mean, Median, and Mode
Guidance
Before class begins, bring out the blocks that you and your classmates chose from the pail for the concept on mean.
In addition, have the grid paper on display where each student in your class posted his or her number of blocks.