Loading... How to calculate standard deviation

This is a hubpages article which describes how to Calculate Standard Deviation manually in six straightforward steps;- 1. Get the Mean 2. Get the deviations 3. Square these 4. Add the squares 5. Divide by total numbers less one 6. Square root of result is Standard Deviation. The article also includes a step by step How To for Excel with screenshots plus a sample Excel sheet for those who just want to see it done. keep reading →

First, you need to determine the mean. The mean of a list of numbers is the sum of those numbers divided by the quantity of items in the list (read: add all the numbers up and divide by how many there are). Then, subtract the mean from every number... keep reading →