Stat Topics

Greek Letters in Statistics

Letter

Name

Statistical Reference

a

alpha - lower case

Significance, i.e. the probability of a type I error.

Confidence is (1 - a)100% .

b

beta - lower case

Consumer's risk, i.e. the probability of a type II error.

m

mu - lower case

Population mean.

s

sigma - lower case

Population standard deviation.

S

sigma - upper case

Tells the reader to sum what follows it in a formula.

r

rho - lower case

Population correlation coefficient.

q

theta - lower case

Population proportion (in some texts).

c 2

lower case chi squared

(Greek letter squared)

A type of probability distribution used in testing hypotheses involving more than two possible outcomes.

 

Stat Topics