Ensemble Prediction Variance

Problem

The disagreement among ensemble members is measured by the population variance of their scalar predictions.

Given the prediction list, return the variance.

Hint

Average the squared deviations from the mean prediction.

case 1

in: [[1,2,3]]

expected: 0.6666666666666666

case 2

in: [[0,0]]

expected: 0

case 3

in: [[2,4,6,8]]

expected: 5

Starter codePython

def ensemble_prediction_variance(preds):
    # Your code here
    pass

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