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I implemented a Gaussian Naive Bayes classifier and I got a test score (99,99%) higher than the train score (96,87%) Is this normal or does it mean that my model is underfitting ? Thank you.

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  • $\begingroup$ It could be any number of things, try a different split. $\endgroup$ Commented Dec 21, 2022 at 10:12
  • $\begingroup$ You should add more information so that we can help you better (rows quantity, type of data, etc.) $\endgroup$ Commented Dec 21, 2022 at 21:13

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Higher performance on test data set relative to train data set can happen for many reasons. Mostly likely it is due to chance.

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