# Questions tagged [probability]

Probability is the branch of mathematics concerning numerical descriptions of how likely an event is to occur or how likely it is that a proposition is true.

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### Are the raw probabilities obtained from XGBoost, representative of the true underlying probabilties?

1) Is it feasible to use the raw probabilities obtained from XGBoost, e.g. probabilities obtained within the range of 0.4-0.5, as a true representation of approximately 40%-50% chance of an event ...
2answers
12k views

### Xgboost predict probabilities

When using the python / sklearn API of xgboost are the probabilities obtained via the predict_proba method "real probabilities" or do I have to use ...
2answers
137 views

### Proceeding with various methods for news recommendation

I am beginner in ML (i have done only Andrew Ng's ML course) and i have to work on news recommendation. I went through this paper which mentions different methods used for news recommendation (at 7th ...
1answer
595 views

### How do I convert an L2 norm to a probability?

I am using the dot product as a way to measure the similarly of two facial-model vectors extracted by a ML algorithm (OpenFace in fact). I would like to convert the L2 norm to a probability U[0,1] in ...
1answer
2k views

### What is difference between Bayesian Networks and Belief Networks?

While reading some articles about Bayesian Networks, I came across many occurrences of Belief Networks. Do both of these terms mean the same thing or is there any difference between Bayesian Networks ...
2answers
2k views

### Softmax classifier never allows for 100% probability in LSTM?

When working with LSTM I am using a softmax classifier and a one-hot encoded vector approach. The softmax looks like this: $$S(h_i) = \frac{e^{h_i}}{\sum e^{h_{total}}}$$ notice, LSTM's result is a \$...
2answers
684 views

### Do I need to correct predict_proba by training fraction?

Many algorithms provide a predict_proba function indicating probability of a case to belong to that class (e.g. https://scikit-learn.org/stable/modules/generated/...