(also known as “s.d.” and “Std. Dev.”)

FUN FACT: Statistician Karl Pearson was the first person to use the term ‘standard deviation’ in 1893.

What is a Standard Deviation? …AND… How is this statistic calculated?

Watch the video from Aga Khan Academy which provides a thorough review on how to calculate the Standard Deviation of a population or a sample. The full clip is very useful and informative, however you can go directly to a working example on how to calculate s.d. if you skip ahead to 7min 30s.

Click on the link below – standard deviation in simple terms – very clear explanations on this website:  http://www.mathsisfun.com/data/standard-deviation.html

What is the meaning of your Std. Dev. end product?

How do we interpret the answer?