I'm going with D) The probability cutoff for scoring. Seems like the most straightforward explanation for how the ROC curve changes as you move along it.
Ha! The priors in the population? That's a good one. As if the ROC curve is going to be affected by the underlying population distribution. That's just silly.
The true negative rate in the population is definitely not the right answer here. That's more about the base rate of the target variable, not the performance of the model.
I think it's the proportion of events in the training data that changes as you move along the ROC curve. The more events you have, the better your model can discriminate between positive and negative cases.
The ROC curve shows the trade-off between the true positive rate and the false positive rate, so as you move along the curve, the probability cutoff for scoring must be changing. I'm pretty sure that's the right answer.
Lilli
29 days agoChun
16 days agoThomasena
19 days agoBonita
1 months agoAlva
20 days agoBen
1 months agoAlysa
13 days agoLettie
20 days agoElsa
22 days agoDenna
28 days agoHortencia
2 months agoDoug
2 months agoNa
2 months agoDonte
2 months agoYoulanda
2 months agoHobert
1 months agoGwenn
1 months agoCortney
1 months agoMaynard
1 months ago