Machine Learning Zoomcamp 2025

Homework 4: Evaluation Metrics for Classification Statistics

Distribution of scores and reported study time for this homework.

Submissions

678

Median total score

5

Average total score

5

Score distribution

All values are points.

Questions score

Min
-
Median
5.0
Max
6
Q1
4.0
Avg
4.5
Q3
5.0

Learning in public score

Min
-
Median
0.0
Max
7
Q1
0.0
Avg
0.7
Q3
0.8

Total score

Min
-
Median
5.0
Max
14
Q1
4.0
Avg
5.3
Q3
6.0

Time distribution

All values are hours reported by students.

Lectures

Min
0.0
Median
4.0
Max
106.0
Q1
3.0
Avg
6.2
Q3
7.0

Homework

Min
0.0
Median
3.0
Max
60.0
Q1
2.0
Avg
4.1
Q3
5.0

Question breakdown

Correctness and answer distribution per question.

1. ROC AUC feature importance

608 / 680 correct (89.4%)

1 lead_score 40 (5.9%)
2 number_of_courses_viewed 610 (89.7%)
3 interaction_count 20 (2.9%)
4 annual_income 8 (1.2%)

2. Model AUC

649 / 680 correct (95.4%)

1 0.32 4 (0.6%)
2 0.52 21 (3.1%)
3 0.72 426 (62.6%)
4 0.92 225 (33.1%)

3. Precision and recall

379 / 680 correct (55.7%)

1 0.145 10 (1.5%)
2 0.345 49 (7.2%)
3 0.545 380 (55.9%)
4 0.745 235 (34.6%)

4. F1 score

516 / 680 correct (75.9%)

1 0.14 10 (1.5%)
2 0.34 57 (8.4%)
3 0.54 517 (76.0%)
4 0.74 87 (12.8%)

5. 5-Fold CV standard deviation

411 / 680 correct (60.4%)

1 0.0001 11 (1.6%)
2 0.006 156 (22.9%)
3 0.06 411 (60.4%)
4 0.36 91 (13.4%)

6. Best C

506 / 680 correct (74.4%)

1 0.000001 54 (7.9%)
2 0.001 507 (74.6%)
3 1 110 (16.2%)

Calculated: 27 October 2025, 19:03