Boxplot

Teste t

    Paired t-test

data:  dados$Felicidade_T1 and dados$Felicidade_T2
t = -38.124, df = 523, p-value < 2.2e-16
alternative hypothesis: true mean difference is not equal to 0
95 percent confidence interval:
 -3.409442 -3.075291
sample estimates:
mean difference 
      -3.242366 

Tamanho do Efeito

Cohen's d |         95% CI
--------------------------
-1.67     | [-1.80, -1.53]