Standard Deviation. Standard deviation may be abbreviated sd and is most commonly. Its symbol is σ the greek letter sigma the formula is easy.
It is the square root of the variance. A high standard deviation means that values are generally far from the mean while a low standard deviation indicates that values are clustered close to the mean. The only reason behind it is that standard deviation is quite a complex task and there is a high risk to create a mistake and apart from this making calculation by hand is a very slow procedure.
The standard deviation is a measure of how spread out numbers are.
The standard deviation is a measure of how spread out numbers are. The standard deviation is a measure of how spread out numbers are. You might like to read this simpler page on standard deviation first. The standard deviation is a measure of how spread out numbers are.
