Normal distribution how to calculate standard deviation
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1》 work out the mean.
2》then for each number subtract the mean and square the result.
3》then work out the mean of those squared differences.
4》take the square root of that we are done.
2》then for each number subtract the mean and square the result.
3》then work out the mean of those squared differences.
4》take the square root of that we are done.
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