In statistics ,if the sum of the numbers is denoted by the symbol Sigma, then what is the product of the numbers denoted by which symbol?

Question

In statistics we usually use SIGMA symbol a lot for finding the mean ,we add all the numbers ! But what symbol would we use for finding a product of the numbers ?

Answer 1

Product is denoted by ∏. For  example, ∏_i=1ⁿ a_i=a₁a₂...a_n.

∏_i=1ⁿi 1*2*...*n =n!

 

This symbol is used not only in Statistics.