Mediation Indirect Effect Confidence Interval Formulas

Variable definitions:
AB = indirect mediation effect
z = a standard normal score
α = Type I error rate
SE_AB = standard error of the indirect mediation effect

Variable definitions:
µ = mean
σ = standard deviation
erf = error function

Variable definitions:
A = regression coefficient for the relationship between the independent variable and the mediator
B = regression coefficient for the relationship between the mediator and the dependent variable
SE_A = standard error of the relationship between the independent variable and the mediator
SE_B = standard error of the relationship between the mediator variable and the dependent variable