Choosing A Statistical Test Flashcards
Why use statistical tests
To work out the probability of whether a particular set of data could have simply occurred by chance using probably level of 0.05
Three Ds in deciding statistical test
Levels of Data
Design: related or unrelated
Test of Difference or correlation
What is level of data
Nominal, ordinal, interval
Test for difference, unrelated design and nominal
Chi squared
Test for difference, related design and nominal
Sign test
Test for correlation and nominal
Chi squared
What is design of study
Whether data related (repeated measures/matched pairs as similar or same ppts) or unrelated (independent measures or single ppt as dif groups)
Test for difference, unrelated design and ordinal
Mann-Whitney
Test for difference, related design and ordinal
Wilcoxon
Test of correlation and ordinal
Spearman’s rho
Test of difference, unrelated design and interval
Unrelated t-test
Test of difference, related design and interval
Related t-test
Test of correlation and interval
Pearson’s r
Mnemonic to remember what statistical test to use
Carrots Should Come Mashed With Swede Under Roast Potatoes
