Frank Harrell

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176 Answers

newest activity votes
36
If mean is so sensitive, why use it in the first place?
26
Given the power of computers these days, is there ever a reason to do a Chi-squared test rather than Fisher's exact test?
21
Including the interaction but not the main effects in a model
18
Can the MIC algorithm for detecting non-linear correlations be explained intuitively ?
18
T-test for non normal when N>50?
16
How to draw valid conclusions from “big data”?
13
Should quantitative predictors be transformed to be normally distributed?
12
Classic linear model - model selection
10
Classification vs. regression for prediction of the sign of a continuous response variable
10
Choosing the best model from among different “best” models
10
What is your favorite layman's explanation for a difficult statistical concept?
10
Is there a good browser/viewer to see an R dataset (.rda file)
9
When to drop a term from a regression model?
9
Reporting results of a logistic regression
9
Is there any reason to prefer the AIC or BIC over the other?
8
What are chunk tests?
8
Minimum number of observations for logistic regression?
7
How do you decide what your train, validation and test percentages are?
7
ANCOVA and its disturbing assumptions
7
OLS Regression: Interaction effect is significant by itself, not when included in full model--ok to report?
7
Do we need to report the median or the Mean when using a Kruskal-Wallis test?
7
Why continue to teach and use hypothesis testing?
7
Why is variable selection necessary?
7
Maximum number of independent variables that can be entered into a multiple regression equation
7
What do I gain if I consider the outcome as ordinal instead of categorical?
7
What are good references containing arguments against null hypothesis significance testing?
7
Comparing importance of different sets of predictors
7
Model performance metrics for ordinal response
6
is there something like Mann-Whitney U test that can control for a continous variable?
6
Using multiple imputation for Cox proportional hazards, then validating with rms package?
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