MediumProbabilitypr-372

Variance from Second Moment

Problem

The variance equals the second moment minus the squared mean: Var(X) = E[X^2] - (E[X])^2.

Given the second moment and the mean, return the variance.

Hint

Center the second moment on the mean.

case 1

in: [2,1]

expected: 1

case 2

in: [5,2]

expected: 1

case 3

in: [0,0]

expected: 0

Starter codePython

def variance_from_second_moment(second_moment, mean):
    # Your code here
    pass

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