Measures of Central Tendency
Click on the site link below to watch a video of fire station response times. (second in set here) Continue on to see how adding new response times to the set of data on a line plot changes the median and the mean.
Mean
This applet allows the user to investigate the mean, median, and box-and-whisker plot for a set of data that they create. The data set may contain up to 15 integers, each with a value from 0 to 100.
The graph on this page will help you see finding the mean as a balancing out process. Check out the problems on the page to explore Mean Absolute Deviation (MAD).
Median
Mode
Range
Stem and Leaf Plots
This page contains an interactive Stem and Leaf Plot as well as example problems for you to try.
Check out this practice for organizing data in a stem and leaf plot.
Line Plots
Practice a Line Plot
Which Measure of Center is Best?
What else should we consider w hen we are looking at data?