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Linear Regression: used car prices — practice questions · JobPrax
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Machine Learning
Linear Regression: used car prices
Build, test and use a price model for a used-car website with scikit-learn.
New to this? See the worked example first
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Basic (7)
Intermediate (8)
Advanced (5)
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Solved
1
Does age pull the price down?
Basic
2
Your first model: price from age
Basic
3
The price of a brand-new car
Basic
4
Suggest a price
Basic
5
What do 10,000 km cost?
Basic
6
Explain it in rupees
Basic
7
How many cars go into the test?
Basic
8
Test on cars the model has not seen
Intermediate
9
How good is the model? R²
Intermediate
10
More inputs: age, km and owners
Intermediate
11
Turn fuel type into a number
Intermediate
12
Which car does the model get most wrong?
Intermediate
13
RMSE: punish the big misses
Intermediate
14
Train score vs test score
Intermediate
15
How often is the price close enough?
Intermediate
16
Did the extra inputs help?
Advanced
17
Price three new listings
Advanced
18
Cross-validation: a fairer score
Advanced
19
Does a curve fit better?
Advanced
20
Fair price or overpriced?
Advanced