Variance

Problem

Compute the population variance of a list of numbers:

var = sum((x - mean)^2) / N

Hint

Don't forget to subtract the mean before squaring.

case 1

in: [[1,2,3,4,5]]

expected: 2

case 2

in: [[10,10,10]]

expected: 0

case 3

in: [[1,3]]

expected: 1

case 4

in: [[0,5]]

expected: 6.25

Starter codePython

def variance(data):
    # Your code here
    pass

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