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Josh's user avatar
Josh
  • Member for 4 years, 8 months
  • Last seen more than 1 year ago
10 votes
2 answers
4k views

How to avoid overfitting bias when both hyperparameter tuning and model selecting?

9 votes
2 answers
2k views

What are the benefits of time-series over a well-setup linear regression for forecasting?

3 votes
0 answers
494 views

Area under the lift curve as a model performance metric?

3 votes
1 answer
119 views

How to efficiently estimate number of individuals with n+ successes from a series of bernoulli trials?

3 votes
1 answer
479 views

Does gradient boosted trees actually use regression trees for classification, and if so, what does the gradient update?

3 votes
2 answers
342 views

What is accepted practice for avoiding optimistic bias when selecting a model family after hyperparameter tuning?

3 votes
1 answer
60 views

How to balance transformation decisions, feature selection, and model tuning vs time in text analytics?

1 vote
0 answers
163 views

Bootstrap and distribution under the null for confidence intervals vs p-values

1 vote
2 answers
316 views

Bootstrap for CIs and Permutation Resampling for Hypothesis Test?

1 vote
0 answers
45 views

Is there an analogous calculation for weighted max and min, similar to weighted average, for text embeddings?

1 vote
2 answers
567 views

How to calculate a sense of error for estimated number of events with known probabilities?

0 votes
1 answer
52 views

Is it possible to efficiently compute the probability of k+ events in a Poisson Binomial Distribution?

0 votes
0 answers
26 views

Conceptual understanding of effect of standardizing after normalization for clustering

0 votes
1 answer
365 views

Nested CV vs CV with a holdout?

0 votes
0 answers
168 views

Multivariate, multi-series time data more appropriate for regression or ARIMA/time-series?

0 votes
1 answer
132 views

Why is the point biserial correlation of numeric variable and its binary, binned self not 1.0?

0 votes
0 answers
131 views

Will ranking "correlation" of variables by Pearson's return the same results as chi-square and F stats?

0 votes
0 answers
34 views

Is balancing class data for imbalanced problems helpful or just folklore when considering thresholds?