Statistical tests

• Choosing a statistical test

  A) Test of difference

  B) Test of association/correlation

  C) Unrelated design

  D) Unrelated design

  E) Nominal data

  F) Ordinal data

  G) Interval data

  H) Chi-squared

  I) Sign test

  J) Chi-squared

  K) Mann-whitney

  L) Wilcoxon

  M) Spearman's Rho

  N) Unrelated t-test

  O) Related t-test

  P) Pearson's R

  
• What are the three factors to decide a statistical test?

  1. Whether a researcher is looking for a difference/correlation
  2. (Difference only) What design is being used (related or unrelated)
  3. Level of measurement (Data type)
• What are the three levels of measurement (types of data)?

  Nominal, Ordinal, Interval
• Nominal data: Category data
• Ordinal data: Data is ordered
• Interval data: Data is based on numerical scales