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Frank Harrell
  • Member for 11 years, 1 month
  • Last seen this week
127 votes
Accepted

If mean is so sensitive, why use it in the first place?

69 votes

Given the power of computers these days, is there ever a reason to do a chi-squared test rather than Fisher's exact test?

64 votes
Accepted

Including the interaction but not the main effects in a model

58 votes

T-test for non normal when N>50?

57 votes

What does AUC stand for and what is it?

49 votes

Skills hard to find in machine learners?

42 votes
Accepted

If only prediction is of interest, why use lasso over ridge?

41 votes
Accepted

Why is the use of high order polynomials for regression discouraged?

35 votes

The Two Cultures: statistics vs. machine learning?

35 votes

Is normality testing 'essentially useless'?

32 votes
Accepted

Why is AUC higher for a classifier that is less accurate than for one that is more accurate?

31 votes
Accepted

How to draw valid conclusions from "big data"?

30 votes

What's wrong with Bonferroni adjustments?

30 votes

How to choose between t-test or non-parametric test e.g. Wilcoxon in small samples

29 votes

Should covariates that are not statistically significant be 'kept in' when creating a model?

29 votes
Accepted

When is logistic regression suitable?

29 votes
Accepted

Evaluating logistic regression and interpretation of Hosmer-Lemeshow Goodness of Fit

28 votes

When will L1 regularization work better than L2 and vice versa?

27 votes

What happens if the explanatory and response variables are sorted independently before regression?

25 votes

Diagnostics for logistic regression?

24 votes
Accepted

How to translate the output from an lm() fit with a cubic spline into a regression equation

24 votes
Accepted

Can the MIC algorithm for detecting non-linear correlations be explained intuitively?

24 votes

Is it valid to include a baseline measure as control variable when testing the effect of an independent variable on change scores?

24 votes

Logistic Regression - Error Term and its Distribution

24 votes
Accepted

Model building and selection using Hosmer et al. 2013. Applied Logistic Regression in R

24 votes

ASA discusses limitations of $p$-values - what are the alternatives?

23 votes

What is the difference between test set and validation set?

23 votes

How do I test that two continuous variables are independent?

22 votes

Is there any reason to prefer the AIC or BIC over the other?

22 votes

Why don't we use absolute values of differences instead of squared differences in the denominator of the correlation coefficient?

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