Determining Stats test

• Factors Affecting the Choice of Statistical Test:

  • Difference
  • Experimental Design
  • Level of Measurement
• 1. Difference (test of difference) or Correlation (test of relationship)

  • Revealed by hypothesis, aim & method 
• 2) Experimental Design

  • Repeated Measures or Matched Pairs- related design
  • Independent Groups- unrelated design
• 3) Level of Measurement

  • Either NOMINAL, ORDINAL or INTERVAL
• WAY TO REMEMBER:

  Some (Sign Test) Children (Chi-squared) Wrestle (Wilcoxon) Mermaids (Mann-Whitney U) Some (Spearman’s Rho) Ride (Related t-test) Unicorns (Unrelated t-test) Perfectly (Pearson’s R)