Types of inferential tests

• What are the four types of inferential tests?

  > Wilcoxon signed ranks test (sign test)

  > Mann-Whitney

  > Spearmans Rho

  > Chi-squared
• What is the Wilcoxon signed ranks test?

  > Difference - comparing performance so OF two conditions

  > ordinal or interval data

  > Repeated measures

  > WORD

  e.g. participants have a higher test score in the morning than when taking the same test in the afternoon
• What is the Mann-Whitney U test?

  > Difference - comparing performance IN two conditions

  > Ordinal or interval data

  > Independent groups

  > MOI

  e.g. girls friendliness scores (measured using rank scales) is different from boys friendliness score
• What is the Spearman's Rho test?

  > Correlation - relationship between two covariables

  > Ordinal or interval data

  > Two covariables, no IV or DV

  > SOC

  e.g there is a positive relationship between a persons age (in years) and their attractiveness rating (on a ranked scale of 1 to 20)
• What is the Chi-squared test?

  > Difference or association

  > Frequency or nominal data

  > independent items

  > CHIN

  e.g. there is an association between age (over and under 40) and intelligence (high or low score on an IQ test)