What is standard deviation?
Standard deviation, also called “the square root of the variance,” is the statistic that measures the dispersion of a dataset
relative to its mean. In layman's terms, it is the measure of how spread out numbers are. Standard deviation uses the
Greek letter sigma symbol σ.
Variance is the average of the squared differences from the Mean. The square root of the variance can be calculated by
finding each data point's deviation relative to the mean.
To calculate standard deviation, determine first the simple average or the mean of the numbers. Next, subtract the mean for
each number, square it, and then average the result to get the variance. Lastly, calculate the square root of the variance, and
that is your standard deviation.
To help students and professionals solve their math problems conveniently and quickly, Meta-calculator.com provides online
calculators that can be accessed for free. You can rely on our online standard deviation calculator not just for solving the standard deviation but also for determining the mean, median, variance, coefficient of variance, and other relevant statistical data.
How to use our online standard deviation calculator?
Enter all the data values in the table and click the “Calculate Statistics” button.
The online calculator will give the standard deviation result and provide data such as the mean, median, variance,
mean deviations, and a lot more.
Standard deviation calculator handouts & worksheets
Here are a few resources where you can get free handouts and worksheets to test your math skills. Click the link
to the desired worksheet to open the PDF file. All files are downloadable for free!