~Maths and Logic fundamentals + Product Programming skills (Averages within Python)~

Standard deviation - A quantity expressing by how much the members of a group differ from the mean value of the group.

Low deviation - Numbers ranging close to the average.

High deviation - Numbers ranging far from the average.

Sample (Sample of population data set) RED

Sigma (Entirety of population data set) BLUE

∑ = 'The sum of'

n = Number of population data

n - 1 = Number of sample population