5

You should choose the model A. The loss is just a differentiable proxy for accuracy. That said, the situation should be examined in more detail. If the higher loss is due to the data term, examine the data which produce high loss and check for presence of overfitting or incorrect labels. If the higher loss is due to a regularizer then reducing the ...


4

You should note that both your results are consistent with a "true" probability of 87% accuracy, and your measurement of a difference between these models is not statistically significant. With an 87% accuracy applied at random, then there is approx 14% chance of getting the two extremes of accuracy you have observed by chance if samples are chosen randomly ...


1

It depends on your application! Imagine a binary classifier that is always very "confident" - it always assigns P=100% to Class A and 0% to Class B, or vice versa (sometimes wrong, never uncertain!). Now imagine a "humble" model that is perhaps fractionally less accurate, but whose probabilities are actually meaningful (when it says "Class A with ...


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