Frank Harrell

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182 Answers

newest activity votes
38
If mean is so sensitive, why use it in the first place?
aug 13 '11 at 16:46
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?
aug 14 '11 at 0:29
23
Including the interaction but not the main effects in a model
may 21 '11 at 12:31
18
Can the MIC algorithm for detecting non-linear correlations be explained intuitively ?
dec 23 '11 at 16:00
18
T-test for non normal when N>50?
apr 20 '11 at 12:59
16
How to draw valid conclusions from “big data”?
feb 9 '12 at 13:47
13
Should quantitative predictors be transformed to be normally distributed?
jul 6 '11 at 15:26
12
Classic linear model - model selection
oct 17 '11 at 13:06
12
When to drop a term from a regression model?
oct 29 '11 at 13:57
10
Classification vs. regression for prediction of the sign of a continuous response variable
feb 13 at 22:53
10
Choosing the best model from among different “best” models
oct 26 '11 at 12:39
10
What is your favorite layman's explanation for a difficult statistical concept?
jun 7 '11 at 20:26
10
Is there a good browser/viewer to see an R dataset (.rda file)
jun 4 '11 at 18:24
9
Reporting results of a logistic regression
aug 22 '11 at 12:50
9
Is there any reason to prefer the AIC or BIC over the other?
apr 30 '11 at 2:01
8
What are chunk tests?
may 3 '12 at 3:14
8
Why continue to teach and use hypothesis testing?
feb 20 '12 at 2:42
8
Minimum number of observations for logistic regression?
jun 9 '11 at 2:45
7
is there something like Mann-Whitney U test that can control for a continous variable?
may 16 at 13:49
7
How do you decide what your train, validation and test percentages are?
apr 1 at 22:56
7
ANCOVA and its disturbing assumptions
dec 2 at 19:40
7
OLS Regression: Interaction effect is significant by itself, not when included in full model--ok to report?
nov 24 at 14:45
7
Do we need to report the median or the Mean when using a Kruskal-Wallis test?
aug 6 at 13:07
7
Why is variable selection necessary?
nov 11 '11 at 14:49
7
Is it valid to include a baseline measure as control variable when testing the effect of an independent variable on change scores?
sep 20 '11 at 11:45
7
Acceptable r-square value for multiple linear regression model
aug 21 '11 at 17:04
7
Maximum number of independent variables that can be entered into a multiple regression equation
jul 10 '11 at 12:51
7
What do I gain if I consider the outcome as ordinal instead of categorical?
jun 8 '11 at 12:41
7
What are good references containing arguments against null hypothesis significance testing?
may 8 '11 at 19:03
7
Comparing importance of different sets of predictors
apr 27 '11 at 11:43
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