Normality assumption

Dependent variable is normally distributed in each population.

How to test for the normality assumption?

Shapiro-Wilk and Kolmogorov-Smirnov
Descriptives
- skewness
- kurtosis
Null hypothesis: Population distribution is normal
- If reject null hypothesis → check why they are’t normal: skewness and kurtosis
  - Order descriptives
  - If /= 0 > 2 stderr, evidence of phenomena in population
- Nonsignificance does not imply normal distribution of dependent variable