So now that we've figured out the variance, it's very easy to figure out the standard deviation of both of these characters. The standard deviation of this first one up here, of this first data set, is going to be the square root of 200. Square root of 200 is what? The square root of 2 times 100, this is equal to 10 square roots of 2. That's that first data set. Now the variance of the second data set is just going to be the square root of 2. Sorry, the standard deviation of the second data set is going to be the square root of its variance, which is 2.