RECAP on parametric
Central tendencies
required data from normal distribution
assumes null
interval and ratio
whats a z score
number SD away from mean
z score 1 mean
1 sd away from mean
how to calculate z score
Z= x(value) - u (mean samp) / SD
(value means results like 1 person =23 anounther results may be 45.
ks and sw difference
ks larger 50 sample size.
sw smaller 50 sample size
ks and sw similarities
both tests of normality
therefore both testing for null
order of tests
first look at ks- if null
look as SW test-