Why is the F1 score introduced as a performance measure?

F1 Score and Model Evaluation

Interactive Video
•
Mathematics, Science, Computers
•
9th - 12th Grade
•
Hard

Patricia Brown
FREE Resource
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10 questions
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1.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
To provide a single metric that balances precision and recall
To simplify the evaluation process
To replace accuracy completely
To make precision and recall obsolete
2.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
In the fishing example, what was the main issue with the first model?
It caught too many blue fishes
It had high recall but low precision
It did not catch any fish
It had high precision but low recall
3.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
What change was made to the model to improve recall in the fishing example?
Using a different type of net
Reducing the number of nets
Changing the bait to attract all fishes
Using a smaller net
4.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
What is the F1 score?
The geometric mean of precision and recall
The sum of precision and recall
The harmonic mean of precision and recall
The arithmetic mean of precision and recall
5.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
Why is the harmonic mean used for calculating the F1 score instead of the arithmetic mean?
It gives more weight to extreme values
It punishes extreme values
It is a standard practice
It is easier to calculate
6.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
In the confusion matrix example, what was the precision of the model?
85%
1%
43%
16%
7.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
What was the recall of the model in the confusion matrix example?
1%
85%
43%
16%
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