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.

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.

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!

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.

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

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

In this video we learn about the first basic method to find the mean of grouped data.

Take a sample from a population, calculate the mean of that sample, put everything back, and do it over and over. How much do those sample means tend to vary from the "average" sample mean?

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