Inferential testing Flashcards
define nominal level data
number of pps in categories which cannot be put in order (e.g. brown eyes, blue eyes)
define interval level data
scores of equal intervals (e.g. time in minutes)
define ordinal level data
scores that represent each pp and can be put in order - but aren’t at set intervals (e.g. ratings 1-10)
define type I error
false positive - null hypothesis is true but rejected (investigator claims there is an effect when there is none)
define type II error
false negative - null hypothesis is false but accepted (investigator claims there is no effect when there is one)
list the levels of data from lowest to highest
nominal, ordinal, interval
what is a level of signif
when we are confident enough that results aren’t due to chance
when are type I errors likely to occur
when probability limits are set too low (e.g. P<0.1)
when are type II errors likely to occur
when probability limits are set too high (e.g. P<0.01)
give the acronym for choosing stats tests
Simon Cowell Wants Most Singers Receiving Unanimous Praise
give the stats tests for nominal level data
Sign test, Chi squared
give the stats tests for ordinal level data
Wilcoxen, Mann whitney, Spearman’s rho
give the stats tests for interval level data
Related t-test, Unrelated t-test, Pearsons r
what are the related experimental designs
repeated measures and matched pairs
what is the unrelated experimental design
independent groups
