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ihadanny
  • Member for 8 years, 6 months
  • Last seen more than a week ago
  • Israel
61 votes
4 answers
113k views

What is the proper usage of scale_pos_weight in xgboost for imbalanced datasets?

24 votes
4 answers
90k views

Why is P(A,B|C)/P(B|C) = P(A|B,C)?

19 votes
1 answer
8k views

Can you give a simple intuitive explanation of IRLS method to find the MLE of a GLM?

14 votes
1 answer
25k views

t.test returns an error "data are essentially constant"

9 votes
2 answers
1k views

Why is the variable importance metric suggested by Breiman specific only to random forests?

9 votes
2 answers
5k views

Can you give an intuition behind the FTRL update step?

9 votes
2 answers
8k views

Fisher's score function has mean zero - what does that even mean?

8 votes
1 answer
2k views

can you explicitly show me the first iteration of newton-raphson and fisher scoring?

7 votes
1 answer
125 views

need intuition: why is there no winning strategy to this game?

5 votes
2 answers
384 views

Why is it that when the score variance gets LARGER we get MORE confident about the MLE estimate?

4 votes
1 answer
137 views

In GLM do we try to model E(T(y)) or E(y)?

4 votes
1 answer
213 views

Should I avoid mixed ARMA models?

4 votes
1 answer
510 views

Feature importance for xgboost classification of a sample

4 votes
0 answers
123 views

when fitting a regression model to a time-series, can I use lagged values of the time-series itself?

3 votes
2 answers
257 views

using the test population as an eval_set when doing hyperparameter optimization

3 votes
0 answers
35 views

Why are these 2 ARIMA formulations equivalent?

3 votes
1 answer
123 views

Can we do hypothesis testing for OLS estimator without assuming normality for the errors?

3 votes
1 answer
3k views

Is it necessary to use warm_start when tracking oob_score in scikit RandomForestClassifier?

2 votes
0 answers
298 views

Interpreting random survival forest mortality

2 votes
0 answers
66 views

how come that the variance of an estimate is smaller than the variance of the true value?

2 votes
1 answer
536 views

time series forecasting - predicting the next 24 hours

2 votes
0 answers
591 views

LIME - local linear explanations for global black-box models work for LogisticRegression but not for RandomForest?

2 votes
1 answer
422 views

Need intuition - how do they simplify the Q function for gaussian mixture EM?

2 votes
1 answer
277 views

why isn't the tscv function allowing for step-size other than 1?

2 votes
0 answers
23 views

imbalanced regression problem + lower bound prediction + custom error weighting

2 votes
0 answers
34 views

Is there a relation between the characteristic roots and the s.e of the arima coefficients?

2 votes
1 answer
1k views

catboost does not overfit - how is that possible?

2 votes
1 answer
28 views

when fitting a dynamic regression model to a TS, what would happen if we first fit a regression model and then fit an ARMA?

2 votes
1 answer
354 views

BERT masking - why does it require sampling, and how does it mitigate the mismatch of the [MASK] token when fine-tuning?

1 vote
0 answers
24 views

alias method - for n discrete values, should the table size be n-1 or n? [closed]