In this tutorial, we learn how to find the standard deviation with the ZScore formula. First, take your problem and write it out one by one underneath each other. Then, you will need to substitute the numbers in for the variables that are in the problem. Once you do this, you will follow the basic rules of math to find out what the answer to the problem is appropriately. Once you have done this, finish off the problem to find the answer, then you will have found the standard deviation using the easy Zscore formula and will be ready to move onto more difficult problems!
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How To: Find the area of a circle when you know the diameter

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How To: Find a data point (Xi) with the ZScore formula
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