Wald Identity Value

Problem

Wald's identity states that for a random number N of independent summands with mean mean_x, the expected sum is:

E[S_N] = E[N] * E[X] = mean_n * mean_x.

Return the product.

Hint

Average the random number of summands separately from the summand size.

case 1

in: [10,2]

expected: 20

case 2

in: [3.5,4]

expected: 14

case 3

in: [0,5]

expected: 0

Starter codePython

def wald_identity_value(mean_n, mean_x):
    # Your code here
    pass

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