Ratio Estimator

Problem

Return the ratio estimator population_total_x * sum(y) / sum(x). Return 0.0 when either list is empty or sum(x) is zero.

Hint

Scale the known population total of x by the observed y-to-x ratio.

case 1

in: [[2,4,6],[1,2,3],100]

expected: 200

case 2

in: [[1,2],[1,1],10]

expected: 15

case 3

in: [[1],[0],5]

expected: 0

case 4

in: [[],[1],10]

expected: 0

case 5

in: [[5,5],[2,3],10]

expected: 20

Starter codePython

def ratio_estimator(y, x, population_total_x):
    # Your code here
    pass

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