Mediation Proportion

Problem

Compute the proportion of the total effect that is mediated: (a*b) / (a*b + c_prime).

Return 0.0 when the denominator is 0.

Hint

The indirect effect a*b shares the total effect with the direct path c_prime.

case 1

in: [0.5,0.8,0.1]

expected: 0.8

case 2

in: [0.2,-0.1,-0.02]

expected: 0.5

case 3

in: [0,0,0]

expected: 0

case 4

in: [1,2,-2]

expected: 0

Starter codePython

def mediation_proportion(a, b, c_prime):
    # Your code here
    pass

4 test cases · run your code against them in the editor