Standard Deviation. Its symbol is σ the greek letter sigma the formula is easy. Standard deviation is an important calculation for math and sciences particularly for lab reports.
You might like to read this simpler page on standard deviation first. It tells us to what degree a set of numbers are dispersed around an average. It tells you on average how far each value lies from 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.
As standard deviation is one of the hardest things so it can not be calculated by hands there is still no statistician who can calculate it on hands. 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. Standard deviation usually denoted by the lowercase greek letter σ is the average or means of all the averages for multiple sets of data. Standard deviation is an important calculation for math and sciences particularly for lab reports.
