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chl
  • Member for 11 years, 9 months
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112 votes

Can principal component analysis be applied to datasets containing a mix of continuous and categorical variables?

94 votes
Accepted

Using principal component analysis (PCA) for feature selection

86 votes
Accepted

When to use regularization methods for regression?

84 votes
Accepted

How to tell if data is "clustered" enough for clustering algorithms to produce meaningful results?

82 votes

How would you explain covariance to someone who understands only the mean?

81 votes
Accepted

How to efficiently manage a statistical analysis project?

76 votes
Accepted

How to choose nlme or lme4 R library for mixed effects models?

66 votes
Accepted

Explain the difference between multiple regression and multivariate regression, with minimal use of symbols/math

64 votes

How to plot ROC curves in multiclass classification?

59 votes

How to calculate pseudo-$R^2$ from R's logistic regression?

57 votes
Accepted

Where to cut a dendrogram?

54 votes
Accepted

What is Deviance? (specifically in CART/rpart)

54 votes
Accepted

How to visualize what ANOVA does?

53 votes
Accepted

Is adjusting p-values in a multiple regression for multiple comparisons a good idea?

52 votes
Accepted

How to actually plot a sample tree from randomForest::getTree()?

48 votes
Accepted

How to measure/rank "variable importance" when using CART? (specifically using {rpart} from R)

48 votes
Accepted

Under what conditions should Likert scales be used as ordinal or interval data?

47 votes
Accepted

Choosing a clustering method

46 votes
Accepted

Why is there a difference between manually calculating a logistic regression 95% confidence interval, and using the confint() function in R?

46 votes
Accepted

Kendall Tau or Spearman's rho?

42 votes

Under what conditions does correlation imply causation?

41 votes
Accepted

Feature selection for "final" model when performing cross-validation in machine learning

41 votes
Accepted

Best practice when analysing pre-post treatment-control designs

39 votes
Accepted

Is interaction possible between two continuous variables?

37 votes
Accepted

Does it ever make sense to treat categorical data as continuous?

36 votes
Accepted

How to plot decision boundary of a k-nearest neighbor classifier from Elements of Statistical Learning?

34 votes
Accepted

Inter-rater reliability for ordinal or interval data

34 votes
Accepted

Correcting p values for multiple tests where tests are correlated (genetics)

34 votes
Accepted

Computing percentile rank in R

33 votes

What are the differences between Factor Analysis and Principal Component Analysis?

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