Durbin Watson from Residuals

Problem

The Durbin-Watson statistic is sum of squared successive residual differences divided by the residual sum of squares.

Given the residual list in time order, return the statistic.

Hint

Successive differences live in the numerator, squared residuals in the denominator.

case 1

in: [[1,-1,1,-1]]

expected: 3

case 2

in: [[0,0,1]]

expected: 1

case 3

in: [[1,0]]

expected: 1

Starter codePython

def durbin_watson_from_residuals(residuals):
    # Your code here
    pass

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