Khan Academy
Khan Academy: Interquartile Range (Iqr)
Practice calculating the interquartile range from a set of data. Students are able to check their answers, view a solution, and watch a video or use a hint.
BBC
Bbc Revise Wise Maths: Mode, Median, Mean
This website from the BBC is a great introduction to averages (mean, median, and mode) and will take you through some interactive learning activities. A practice test and worksheet are also provided.
Education Development Center
Tune in to Learning: Understanding Mean, Median and Mode
Have you ever wondered what the difference is with mean, median, and mode? Here are some exercises that will help you understand what each is.
Palomar Community College District
Palomar College: Mode, Median, Mean Examples
A series of step-by-step worked problems demonstrating how to take a set of data and produce the measures of central tendency. Hints are provided along the way and the final measures are shown for the user to check.
Varsity Tutors
Varsity Tutors: Hotmath: Algebra Review: Mode, Mean and Median
Find a quick, concise explanation of a mode. An example is given and clearly explained. Mean and median are also explained.
Education Place
Houghton Mifflin: Eduplace: Extra Practice Quiz Mean, Median, Mode, Range 2
Practice using the graph to answer questions about the mean, median, mode and range. Read the interactive quiz rules and then click on the "Begin" ticket. If you answer incorrectly you get one more chance to try again then you are told...