Mean, median, and mode

Let's do a little refresher of statistics 101. This is like elementary school stuff, but good to go through it again and see how these different techniques are used: Mean, median, and mode. I'm sure you've heard those terms before, but it's good to see how they're used differently, so let's dive in.

This should be a review for most of you, a quick refresher, now that we're starting to actually dive into some real statistics. Let's look at some actual data and figure out how to measure these things.

Mean

The mean, as you probably know, is just another name for the average. To calculate the mean of a dataset, all you have to do is sum up all the values and divide it by the number of values that you have.

Sum of samples/Number of samples

Let's take this example, which calculates the mean (average) number of children per house in my neighborhood.

Let's say I went door-to-door in my neighborhood and asked everyone, how many children live in their household. (That, by the way...