Use the following sample data to fond the standard deviation: -1, 0, 2, 3, 7, 10, 10?
1 Answer
Approx.
Explanation:
First of all, we need the mean: sum of all values, divided by how many values we have
Then, we need the squared distances of each element from the mean, i.e. for each value
Now sum all the squared distances, and divide them by the number of observations to obtain the variance:
Finally, the standard deviation is defined as the square root of the variance: