Wolfgang

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37 Answers

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28
How do you calculate the expectation of $\left(\sum_{i=1}^n {X_i} \right)^2$?
16
What are the ANOVA's benefits over a normal linear model?
15
Formula for autocorrelation in R vs. Excel
13
Percentage of overlapping regions of two normal distributions
12
What is the difference between using aov() and lme() in analyzing a longitudinal dataset?
11
Why is the Breusch-Pagan test significant on simulated data designed not to be heteroscedastic?
11
Can non-random samples be analyzed using standard statistical tests?
10
Does transformation of r into Fisher z benefit a meta-analysis?
10
How to calculate Standard Error of Odds Ratios?
10
Including the interaction but not the main effects in a model
9
Tiny (real) datasets for giving examples in class?
9
James-Stein estimator: How to calculate $\sigma^2$ in shrinkage factor?
8
Efficient calculation of matrix inverse in R
8
Left skewed vs. symmetric distribution observed
8
Accommodating entrenched views of p-values
8
How to test if the slopes in the linear model are equal to a fixed value?
7
Funnel plot with asymmetrical point sizes
7
Can we compare correlations between groups by comparing regression slopes?
7
Proportion of explained variance in a mixed-effects model
7
Quantile-Quantile Plot with Unknown Distribution?
6
Weird residuals in linear regression
6
Effect size for interaction effect in pre-post treatment-control design
5
Regression $R^2$ and correlations
5
Statistics interview questions
4
Standard error from OR and HR
4
Listing of typical correlations across spectrum of topics and disciplines to assist with teaching meaning of correlation coefficient
3
Extracting fixed effects table output from lme object
3
Variable order and accounted variability in linear mixed-effects modeling
3
Assumptions regarding bootstrap estimates of uncertainty
3
Poisson distribution and statistical significance
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