The population of Sigma Alimentos is 27,000.
Sigma Pharmaceuticals's population is 850.
The population of Sigma-Aldrich is 7,600.
The population of Sigma-Tau is 2,010.
Mu Sigma Inc.'s population is 2,011.
Mu Sigma Inc.'s population is 1,500.
sigma
Sigma
σ sigma
Sigma is a Greek symbol used for many variables in mathematics and science. However, within statistics, the variance is sigma squared and it is always positive. Sigma is used as the standard deviation of a population, and as calculated, it is always equal or greater than 0 (a positive number). However, in discussing errors, one can consider adding or subtracting sigma, ie the error in our experiment is +/- one sigma from the population.
It's a lower-case Greek sigma followed by a superscript 2, in other words, "sigma-squared".
You probably mean the Greek letter sigma since this is the probability area.Lower-case sigma is usually reserved to represent a population standard deviation. When it is squared it represents a population variance. With a caret ('hat') over it it represents an estimator of the population standard deviation.Upper-case sigma is most often used to mean summation (adding up) of terms given by the expression after the sigma. The limits of summation are given above and below the sigma symbol in terms of one of the variables in the expression.
the small greek letter sigma squared.