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David Marx
  • Member for 10 years, 4 months
  • Last seen more than a month ago
3 answers
201 votes
135k views
298 bookmarks
R's lmer cheat sheet
7 answers
198 votes
174k views
169 bookmarks
PCA on correlation or covariance?
10 answers
197 votes
100k views
198 bookmarks
Why is accuracy not the best measure for assessing classification models?
5 answers
135 votes
44k views
107 bookmarks
What is the .632+ rule in bootstrapping?
10 answers
101 votes
278k views
94 bookmarks
What's the difference between correlation and simple linear regression?
5 answers
88 votes
44k views
63 bookmarks
Mutual information versus correlation
5 answers
81 votes
47k views
49 bookmarks
What is regularization in plain english?
9 answers
65 votes
26k views
88 bookmarks
Advanced statistics books recommendation
3 answers
55 votes
68k views
68 bookmarks
Interpretation of log transformed predictor and/or response
3 answers
53 votes
14k views
54 bookmarks
Consider the sum of $n$ uniform distributions on $[0,1]$, or $Z_n$. Why does the cusp in the PDF of $Z_n$ disappear for $n \geq 3$?
5 answers
35 votes
22k views
21 bookmarks
Can SVM do stream learning one example at a time?
4 answers
34 votes
23k views
22 bookmarks
How to create an arbitrary covariance matrix
6 answers
33 votes
21k views
12 bookmarks
Line graph has too many lines, is there a better solution?
5 answers
33 votes
9k views
10 bookmarks
Why do political polls have such large sample sizes?
4 answers
32 votes
15k views
42 bookmarks
Internal vs external cross-validation and model selection
1 answer
31 votes
6k views
26 bookmarks
"Kernel density estimation" is a convolution of what?
1 answer
21 votes
12k views
12 bookmarks
Choosing between uninformative beta priors
1 answer
18 votes
11k views
24 bookmarks
Topic prediction using latent Dirichlet allocation
3 answers
16 votes
2k views
4 bookmarks
Using glm() as substitute for simple chi square test
3 answers
15 votes
6k views
11 bookmarks
Regularization and feature scaling in online learning?
3 answers
13 votes
3k views
8 bookmarks
Standard measure of clumpiness?
1 answer
12 votes
3k views
7 bookmarks
How do you select variables in a regression model?
1 answer
12 votes
2k views
3 bookmarks
Sampling distribution of the radius of 2D normal distribution
1 answer
11 votes
8k views
3 bookmarks
How to deal with very s-shaped qq plot in a linear mixed model (lme4 1.0.4)?
3 answers
11 votes
6k views
7 bookmarks
Comparing regression models on count data
1 answer
10 votes
12k views
8 bookmarks
How to know if my data fits Pareto distribution?
5 answers
9 votes
11k views
4 bookmarks
Cosine similarity on sparse matrix
2 answers
9 votes
4k views
3 bookmarks
How to compare measurements and uncertainties made with different measuring instruments?
2 answers
8 votes
3k views
4 bookmarks
Why discriminative models are preferred to generative models for sequence labeling tasks?
1 answer
8 votes
297 views
1 bookmarks
When/why does the central tendency of a resampling simulation markedly differ from the observed value?