It is the lower case Greek sigma.
The symbol for standard deviation is sigma , σ.
Sigma
Sigma
A lower case s is the symbol.
σ sigma
σ (sigma)
Yes.
Standard deviation is a way to describe how the data is distributed around the Arithmatic Mean. It is not a simple formula to calculate, as shown in the links.
The standard deviation is the standard deviation! Its calculation requires no assumption.
The standard deviation of the population. the standard deviation of the population.
Standard deviation is a way to describe how the data is distributed around the Arithmatic Mean. It is not a simple formula to calculate, as shown in the links.
The standard deviation is 0.