statistical tests Flashcards
Test of difference, independant/unrelated, nominal
Chi-squared
test of difference, independant/unrelated, ordinal
Mann-Whitney
Test of difference, independant/unrelated, interval
Unrelated t-test
test of difference, repeated/related, nominal
sign test
test of difference, repeated/related, ordinal
wilcoxon
test of difference, repeated/related, interval
Related t-test
test of correlation, nominal
Chi-squared
Test of correlation, Ordinal
Spearmans rho
Test of correlation, interval
Pearsons r
significance definition
A statistical term which indicates whether the null hypothesis can be rejected or not
type 1 error
false positive
type 2 error
false negative
descriptive statistics
summarise/description data and include measures of central tenancy and measures of dispersion
Infarential statistics
allow inferences to be made from data and enables the significance of a result to be determined
nominal data
category data (showing a preference)
ordinal data
data that is in an order eg rating
interval data
measurements on a scale of fixed units
parametric tests
more powerful and robust tests
non-parametric tests
less powerful
For parametric tests there are 3 conditions:
interval data, normal distribution and homogenicy of varients
degree of freedom for related t test
Na + Nb - 2
degree of freedom for unrelated t-test
Na - 1
