Margin of Error Proportion

Problem

The margin of error for a proportion is z * sqrt(p_hat (1 - p_hat) / n).

Given the sample proportion, sample size, and critical z, return the margin.

Hint

It is half the Wald interval width.

case 1

in: [0.5,400,1.96]

expected: 0.049

case 2

in: [0.2,100,2.576]

expected: 0.10304

case 3

in: [0.75,1000,1.645]

expected: 0.022525090177399957

Starter codePython

def margin_of_error_proportion(p_hat, n, z):
    # Your code here
    pass

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