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A data scientist is using the following confusion matrix to assess model performance:
The model is predicting whether a delivery truck will be able to make 200 scheduled delivery stops. Every time the model is correct, the company saves an hour in planning and scheduling of maintenance work. Every time the model is wrong, the company loses four hours of delivery time for the truck. Which of the following is the net model impact for the company?
Suggested Answer: A
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Treat each ''predicted-to-fail'' and ''predicted-to-succeed'' row as coming from 100 cases apiece (200 total).
22 comments · newest first
LO
Lorrine
2 days ago
I feel like option B could be right. Saving hours sounds good!
NO
Noel
8 days ago
This question is tricky! I think it’s about calculating the net impact.
NO
Noah
13 days ago
If we do the math, A makes sense. 25 hours lost seems accurate.
MA
Martina
18 days ago
I’m confused. How do we factor in the wrong predictions?
CA
Carin
23 days ago
I agree with Eloisa. The losses add up quickly!
EL
Eloisa
28 days ago
But wait, if the model is wrong, it costs more time. I lean towards A.
CA
Carman
1 month ago
I feel like option B could be right. Saving hours sounds good!
YA
Yaeko
1 month ago
This question is tricky! I think it’s about calculating the net impact.
CO
Coleen
1 month ago
Totally agree, it's all about the net impact!
BR
Breana
2 months ago
Wait, how do we even calculate that? Sounds tricky.
LA
Lawrence
2 months ago
I think it's 25 hours saved, right?
PE
Peggy
2 months ago
But it costs 4 hours for each wrong prediction!
PE
Peter
2 months ago
The model saves 1 hour for each correct prediction.
NO
Noel
2 months ago
Totally agree, it’s definitely a net gain!
EU
Eun
2 months ago
Wait, how do we even calculate that? Sounds tricky.
CH
Chaya
3 months ago
I think it’s 25 hours saved, right?
CY
Cyril
3 months ago
But it costs 4 hours for each wrong prediction!
TR
Truman
3 months ago
The model saves 1 hour for each correct prediction.
LU
Luisa
3 months ago
I vaguely recall that we should multiply the true positives by the hours saved and the false negatives by the hours lost. I hope I remember the right numbers!
JO
Jonell
3 months ago
I think if we calculate the total hours saved and lost, we can find the net impact. But I'm a bit confused about how to weigh the hours differently for correct and incorrect predictions.
ER
Erinn
4 months ago
This question feels similar to one we practiced about cost-benefit analysis in model evaluation. I think I need to focus on the hours saved versus lost.
NI
Nicholle
5 months ago
I remember we discussed how to calculate the net impact based on true positives and false negatives, but I'm not sure how to apply it here.