Machine Learning Zoomcamp 2025

Homework 3: Machine Learning for Classification Statistics

Distribution of scores and reported study time for this homework.

Submissions

854

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
4.8
Q3
6.0

Learning in public score

Min
-
Median
0.0
Max
7
Q1
0.0
Avg
0.6
Q3
0.0

Total score

Min
-
Median
5.0
Max
14
Q1
4.0
Avg
5.4
Q3
6.0

Time distribution

All values are hours reported by students.

Lectures

Min
0.0
Median
4.0
Max
400.0
Q1
3.0
Avg
7.5
Q3
7.0

Homework

Min
0.0
Median
3.0
Max
53.0
Q1
2.0
Avg
4.0
Q3
4.0

Question breakdown

Correctness and answer distribution per question.

1. Mode for industry

821 / 856 correct (95.9%)

1 NA 8 (0.9%)
2 technology 15 (1.8%)
3 healthcare 10 (1.2%)
4 retail 823 (96.1%)

2. Biggest correlation

693 / 856 correct (81.0%)

1 interaction_count and lead_score 27 (3.2%)
2 number_of_courses_viewed and lead_score 25 (2.9%)
3 number_of_courses_viewed and interaction_count 107 (12.5%)
4 annual_income and interaction_count 694 (81.1%)

3. Biggest MI

778 / 856 correct (90.9%)

1 industry 28 (3.3%)
2 location 22 (2.6%)
3 lead_source 780 (91.1%)
4 employment_status 21 (2.5%)

4. Accuracy

701 / 856 correct (81.9%)

1 0.64 86 (10.0%)
2 0.74 703 (82.1%)
3 0.84 56 (6.5%)
4 0.94 4 (0.5%)

5. Feature selection

479 / 856 correct (56.0%)

1 'industry' 481 (56.2%)
2 'employment_status' 164 (19.2%)
3 'lead_score' 191 (22.3%)

6. Parameter tuning

602 / 856 correct (70.3%)

1 0.01 603 (70.4%)
2 0.1 118 (13.8%)
3 1 81 (9.5%)
4 10 23 (2.7%)
5 100 10 (1.2%)

Calculated: 19 October 2025, 05:15