When computing the variance, we squared the differences to remove any negative numbers. However, that made the variance quite a large number.

The standard deviation reverses that inflation of the number by taking the square root. Ultimately, the standard deviation is the square root of the variance.

We can compute the square root two ways:
1. Using the sqrt() of the math module. You'll have to import math and then use the math.sqrt() function to compute the square root.
2. You can use a trick. The trick is that the square root is equivalent to raising a number to the one-half power. This is more of a mathematical property than a trick, but whatever.