The standard deviation is calculated as the weighted average of all the deviations from the expected value, and it indicates how far above or below the expected value the actual value is expected to be.

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The standard deviation is a measure of how spread out the data is. It is calculated by taking the square root of the variance, which is the average of the squared deviations from the mean. The standard deviation indicates how far above or below the mean the data is expected to be.

The Standard Deviation Is Calculated as the Weighted Average of All