Learn about mean, median, and mode with Khan Academy's comprehensive review of these fundamental concepts in statistics.

The mean (average) of a data set is found by adding all numbers in the data set and then dividing by the number of values in the set. The median is the middle value when a data set is ordered from least to …

Learn how to calculate the mean by walking through some basic examples & trying practice problems.

Practice calculating the mean (average) of a data set. The mean gives us a sense of the middle, or center, of the data.

Calculate the mean, median, or mode of a data set!

Practice calculating and interpreting the mean and standard deviation of a discrete random variable.

Calculating the mean Calculating the median Choosing the "best" measure of center Mean, median, and mode review

Practice finding the median of a data set. Like the mean, the median gives us a sense of the middle, or center, of the data.

Mean absolute deviation (MAD) of a data set is the average distance between each data value and the mean. Mean absolute deviation is a way to describe variation in a data set. Mean absolute deviation …

The Mean Value Theorem states that if a function f is continuous on the closed interval [a,b] and differentiable on the open interval (a,b), then there exists a point c in the interval (a,b) such that f'(c) …