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.

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! Created by Sal Khan and Monterey Institute for …

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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 …

To find the mean, you add up all of the numbers together and then divide the sum by the total amount of values (there are 4 values). Since only one of those numbers is increasing, the …

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

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Example showing how to check which conditions have been met for a t test about a mean

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.

The amounts in the sample had a mean of 503 milliliters and a standard deviation of five milliliters. They want to test if this is convincing evidence that the mean amount for bottles in this batch is …