Mean, median, and mode are different measures of center in a numerical data set. They each try to summarize a dataset with a single number to represent a "typical" data point from the dataset.

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

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 …

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

Here we give you a set of numbers and then ask you to find the mean, median, and mode. It's your first opportunity to practice with us!

Learn Statistics intro: Mean, median, & mode Mean, median, & mode example Calculating the mean

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

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.

This unit covers common measures of center like mean and median. We'll also learn to measure spread or variability with standard deviation and interquartile range, and use these ideas to …

Practice calculating the mean and standard deviation for the sampling distribution of a sample mean.