lesson 4 of 5 · bias, variance, and leakage in plain codelesson 4 of 5 · bias, variance, and leakage in plain codelesson 4 of 5 · bias, variance, and leakage in plain codelesson 4 of 5 · bias, variance, and leakage in plain codelesson 4 of 5 · bias, variance, and leakage in plain codelesson 4 of 5 · bias, variance, and leakage in plain codelesson 4 of 5 · bias, variance, and leakage in plain codelesson 4 of 5 · bias, variance, and leakage in plain codelesson 4 of 5 · bias, variance, and leakage in plain codelesson 4 of 5 · bias, variance, and leakage in plain codelesson 4 of 5 · bias, variance, and leakage in plain code
Complete the time-based split: train on months up to the cutoff, test strictly after it. For anything predictive, the model trains on the past and is judged on the future.