Cramer-Rao Bound

Problem

Return the Cramer-Rao variance lower bound for an unbiased estimator:

Var(theta_hat) >= 1 / fisher_info

Hint

More Fisher information means a tighter bound on estimator variance.

case 1

in: [2]

expected: 0.5

case 2

in: [0.5]

expected: 2

case 3

in: [10]

expected: 0.1

case 4

in: [1]

expected: 1

Starter codePython

def cramer_rao_bound(fisher_info):
    # Your code here
    pass

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