What are the three criteria for choosing a stats test?
Difference vs correlation
Experimental design
Level of measure
What are the three types of levels of measure
Nominal
Ordinal
Interval
What is nominal data
mode, data in categories like choose an option between three.
What is ordinal data
median, opinions and rankings, things like questionaries or scales out of 10
What is interval data
mean or sd, scientific with equal precise units, like time or weight.
Chi squared test categories
Nominal
Unrelated or test of correlation
Sign test categories
Nominal
Related
Mann-whitney categories
Ordinal
Unrelated
Wilcoton categories
Ordinal
Related
Spearmans rho categories
Ordinal
Test of correlation
Unrelated t test categories
interval
unrelated
Related t test categories
Interval
Related
Pearson R categories
Interval
Test of correlation