Mean, Median, Mode, Range, Outlier

I love this topic. It's very simple and very easy to work with. The only concept that is difficult is the "MEAN."

The most important thing you need to remember is to ALWAYS put the numbers in order from least to greatest.
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I know I sound like a broken ____, but you MUST put the numbers in _____ (order)!

Let's get started:

MEAN: the MEAN is..very mean. It makes you do a lot of calculations! You need to add up ALL the numbers first, and then divide that sum by how many numbers you added.

MEDIAN: the MEDIAN is the MIDdle number. As you have the numbers in order, you need to work your way from the outside of both ends and find the middle number. Then, BAM! You are done! The only tricky part is when there are TWO middle numbers. When there are TWO middle numbers, you must..find the MEAN (add the two numbers, and then divide the sum by 2).

MODE: the MODE is the number that comes out the MOst. There can be more than one mode, or no mode at all! The number that comes out the MOst is the MOde.

RANGE: think: Home on the Range. Since you should have the numbers in order, all you do is subtract the biggest number of the group to the smallest number of the group.

OUTLIER: the OUTLIER is an OUTcast. It sticks out from the rest of the "crowd." When the outlier is lower than the rest of the numbers, the mean becomes lower. When the outlier is higher than the rest of the numbers, the mean becomes higher. Outliers do not affect the median nor the mode. Isn't that nice?

That's it! Not too shabby?

Again. I know I sound like a broken _____, but always remember...to put the numbers in ___.

Have fun reviewing (click on the links on the left side of the screen to practice)!