Cross Validated
chl
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466 Answers

Votes Activity Newest
107
Can principal component analysis be applied to datasets containing a mix of continuous and categorical variables?
Dec 28 '10 at 7:09
90
Using principal component analysis (PCA) for feature selection
Apr 28 '12 at 20:02
83
When to use regularization methods for regression?
Nov 6 '10 at 19:09
83
How to tell if data is "clustered" enough for clustering algorithms to produce meaningful results?
Jun 8 '11 at 8:43
82
How would you explain covariance to someone who understands only the mean?
Nov 10 '11 at 10:50
81
How to efficiently manage a statistical analysis project?
Sep 30 '10 at 10:44
75
How to choose nlme or lme4 R library for mixed effects models?
Dec 10 '10 at 10:40
65
Explain the difference between multiple regression and multivariate regression, with minimal use of symbols/math
Sep 3 '10 at 19:03
64
How to plot ROC curves in multiclass classification?
Aug 27 '10 at 8:12
57
How to calculate pseudo-$R^2$ from R's logistic regression?
Apr 20 '11 at 23:21
56
Where to cut a dendrogram?
Oct 18 '10 at 5:56
54
What is Deviance? (specifically in CART/rpart)
Jan 27 '11 at 9:05
53
Is adjusting p-values in a multiple regression for multiple comparisons a good idea?
Sep 30 '10 at 14:33
53
How to visualize what ANOVA does?
Dec 8 '10 at 22:24
50
How to actually plot a sample tree from randomForest::getTree()?
Nov 1 '12 at 10:02
48
Under what conditions should Likert scales be used as ordinal or interval data?
Aug 19 '10 at 10:00
48
How to measure/rank "variable importance" when using CART? (specifically using {rpart} from R)
Jan 24 '11 at 10:47
47
Choosing a clustering method
Oct 18 '10 at 17:24
46
Kendall Tau or Spearman's rho?
Oct 24 '10 at 14:26
44
Why is there a difference between manually calculating a logistic regression 95% confidence interval, and using the confint() function in R?
Dec 9 '10 at 19:00
42
Under what conditions does correlation imply causation?
Sep 10 '10 at 12:33
41
Best practice when analysing pre-post treatment-control designs
Oct 10 '10 at 13:59
40
Feature selection for "final" model when performing cross-validation in machine learning
Sep 2 '10 at 10:46
37
Does it ever make sense to treat categorical data as continuous?
Nov 3 '10 at 20:14
36
How to plot decision boundary of a k-nearest neighbor classifier from Elements of Statistical Learning?
Jan 24 '12 at 8:37
36
Is interaction possible between two continuous variables?
Nov 27 '10 at 20:47
34
Correcting p values for multiple tests where tests are correlated (genetics)
Sep 18 '10 at 14:32
33
What are the differences between Factor Analysis and Principal Component Analysis?
Oct 6 '10 at 20:33
33
Computing percentile rank in R
Jun 15 '11 at 10:30
32
Inter-rater reliability for ordinal or interval data
Oct 13 '10 at 6:12
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