A statistical measure of the variability of a distribution around its mean is referred to as

The statistical measure of the variability of a distribution around its mean is referred to as the standard deviation.

Here are the steps to calculate it:

1. Find the Mean: Add up all the numbers and then divide by the number of numbers.

2. Subtract the Mean and square the result (the squared difference).

3. Find the mean of those squared differences. (This is called the variance.)

4. Take the square root of the variance to get the standard deviation.

The standard deviation is a measure of how spread out numbers are. Its symbol is σ (the greek letter sigma). The formula is easy: it is the square root of the Variance. So now you ask, "What is the Variance?"