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Top Questions
96 votes

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

hypothesis-testing t-test nonparametric small-sample wilcoxon-mann-whitney asked Oct 29 '14 at 3:02
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94 votes

How much do we know about p-hacking “in the wild”?

hypothesis-testing statistical-significance p-value model-selection reproducible-research asked Mar 9 '16 at 13:14
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46 votes

Graph for relationship between two ordinal variables

data-visualization categorical-data ordinal scatterplot asked Apr 17 '13 at 0:31
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32 votes

Why are there two spellings of “heteroskedastic” or “heteroscedastic”?

terminology heteroscedasticity etymology asked May 22 '15 at 8:47
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24 votes

Geometric interpretation of multiple correlation coefficient $R$ and coefficient of determination $R^2$

regression correlation multiple-regression r-squared geometry asked Nov 12 '14 at 1:07
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20 votes

Real life examples of distributions with negative skewness

distributions skewness teaching asked Mar 7 '14 at 16:33
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20 votes

Is the median a type of mean, for some generalization of “mean”?

mean average median asked Feb 11 '15 at 11:16
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19 votes

What's the history of box plots, and how did the “box and whiskers” design evolve?

data-visualization references boxplot history asked Sep 30 '18 at 0:01
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16 votes

For which distributions is there a closed-form unbiased estimator for the standard deviation?

mathematical-statistics standard-deviation unbiased-estimator asked Jan 5 '15 at 23:19
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14 votes

Why does the number of continuous uniform variables on (0,1) needed for their sum to exceed one have mean $e$?

probability self-study expected-value uniform asked Feb 6 '16 at 17:55
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Top Answers
160
Correlation between a nominal (IV) and a continuous (DV) variable
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50
How do I change the background color of a plot made with ggplot2
stackoverflow.com

47
Geometric interpretation of multiple correlation coefficient $R$ and coefficient of determination $R^2$
stats.stackexchange.com

46
“The total area underneath a probability density function is 1” - relative to what?
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46
Generating random numbers manually
stats.stackexchange.com

35
What does an Added Variable Plot (Partial Regression Plot) explain in a multiple regression?
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33
If my histogram shows a bell-shaped curve, can I say my data is normally distributed?
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33
In multiple linear regression, why does a plot of predicted points not lie in a straight line?
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33
The linearity of variance
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30
Graph for relationship between two ordinal variables
stats.stackexchange.com

28
How can the regression error term ever be correlated with the explanatory variables?
stats.stackexchange.com

27
Does mean = median imply that a unimodal distribution is symmetric?
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24
Odds made simple
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22
What are some of the most common misconceptions about linear regression?
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21
Intuitive explanation of convergence in distribution and convergence in probability
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21
Why are “time series” called such?
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21
How to indicate that I've exceeded my planned spending for some time period, but am not completely lacking money
english.stackexchange.com

20
If X and Y are uncorrelated, are X^2 and Y also uncorrelated?
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20
When someone accuses you of wrong doing after you had accused them of something what do you call that or them?
english.stackexchange.com

20
Why shouldn't the denominator of the covariance estimator be n-2 rather than n-1?
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20
What is an example of perfect multicollinearity?
stats.stackexchange.com

19
Is standard deviation totally wrong? How can you calculate std for heights, counts and etc (positive numbers)?
stats.stackexchange.com

19
Word for dismissing someone's opinions as racist, liberal, etc, instead of debating back
english.stackexchange.com

18
Real life examples of distributions with negative skewness
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18
What is the distribution of $R^2$ in linear regression under the null hypothesis? Why is its mode not at zero when $k>3$?
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18
Ink to data ratio and plot backgrounds
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17
How does one find the mean of a sum of dependent variables?
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17
Probability of surviving an event three times
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17
Will two distributions with identical 5-number summaries always have the same shape?
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17
Is there any difference between $r^2$ and $R^2$?
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