univarite statistics

a basic introduction (not complete)

${\displaystyle \Sigma }$: "sigma" which means "sum of"

example:

${\displaystyle \sum _{i=2}^{4}1\times i}$

(considering numbers 1 to 10)

sum of numbers from 2 to 4 by factor of 1 (${\displaystyle 1\times i}$)

4

Σ 1x_i = 2 + 3 + 4 = 9

i=2

the mean (${\displaystyle X}$) = sum of all scores / number of scores = Σx / n

also:

standard deviation (§)

variance (v)(§²)

box plots

-quartiles

stem plots

class limits, boundaries, classmarks

transformations on data sets

Standard scores (z)