Useless is perhaps a but harsh. It tells you something.
Only if you know the data distribution.
It is pretty easy to get 99.99% accuracy on a dataset that is 99.99% a single class for example.
It tells me nothing because it doesn’t say if they mean precision or recall
It very much tells you something. Accuracy is a measure of overall correctness. Accuracy is something different than precision and recall.
Only if you know the data distribution.
It is pretty easy to get 99.99% accuracy on a dataset that is 99.99% a single class for example.
It tells me nothing because it doesn’t say if they mean precision or recall
It very much tells you something. Accuracy is a measure of overall correctness. Accuracy is something different than precision and recall.