![]() ![]() Then we sum all those differences up (the part that goes, where is your count. We use to represent this, but all it really means is that you square the difference between each value, where is the position of the value you're working with, and the mean. At the same time, we will square these differences, so it does not matter whether you subtract the mean from the value or vice versa. ![]() ![]() Next, we must find the difference between each recorded value and the mean. Remember, to calculate mean, sum your data values and divide by the count, or number of values you have. The first step in calculating standard deviation, or, is to calculate the mean for your sample, or. ![]()
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