Normality (Free Access)


  • Click on:
    • Analyze
    • Descriptive Stats
    • Explore
    • Move the IV to the Dependent list
    • Plots
    • Normality plots with test
    • Ok


  • Kolmogorov-Smirnov Test is used when data for more than 2000 sample is available
  • Shapiro-Wilk test is used for data below 2000 samples
  • For both cases, if the significant level is below <0.05, it is considered that the data is not normally distributed and nonparametric forms of tests are conducted
  • If the significant level is above 0.05, then the data is considered normally distributed and parametric forms of tests are conducted.