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Frequently Asked Questions

How do you calculate percent relative standard deviation?

To calculate the relative standard deviation, divide the standard deviation by the mean and then multiply the result by 100 to express it as a percentage. The relative standard deviation is also known as the coefficient of variation or the variation coefficient.

What percent is 1 standard deviation?

The Standard Deviation is a measure of how spread out numbers are (read that page for details on how to calculate it). When we calculate the standard deviation we find that generally: 68% of values are within. 1 standard deviation of the mean.

What is the equation for standard deviation?

Population Standard Deviation Equation. There are different ways to write out the steps of the population standard deviation calculation into an equation. A common equation is: σ = ([Σ(x - u)2]/N)1/2. Where: σ is the population standard deviation. Σ represents the sum or total from 1 to N. x is an individual value.

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