Applicable Mathematics/Univariate Data
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univarite statistics 
a basic introduction (not complete)
: "sigma" which means "sum of"
(considering numbers 1 to 10)
sum of numbers from 2 to 4 by factor of 1 ()
Σ 1xi = 2 + 3 + 4 = 9
the mean () = sum of all scores / number of scores = Σx / n
standard deviation (§)
class limits, boundaries, classmarks
transformations on data sets
Standard scores (z)