Do you remember mean, median, and mode? Well, you should because it's one of the simplest things in math and is actually used very often. Even in many jobs today. But let's just review. Mean is the average of a set of numbers, the median is the middle number when they are put in order from least to greatest, and the mode is the number that occurs the most. Finding mean, median, and mode is what central tendency is! Easy peasy. Another thing used with mean, median, and mode is measures of dispersion. This is when you find variance and standard deviation. First you find the mean, then you plug in the numbers into the variance equation, and then find the square root. And that's how you find standard deviation!
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