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Top Questions
126
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, 2014 at 3:02
stats.stackexchange.com
95
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, 2016 at 13:14
stats.stackexchange.com
58
votes
Graph for relationship between two ordinal variables
data-visualization
categorical-data
ordinal
scatterplot
asked Apr 17, 2013 at 0:31
stats.stackexchange.com
36
votes
Why are there two spellings of "heteroskedastic" or "heteroscedastic"?
terminology
heteroscedasticity
etymology
asked May 22, 2015 at 8:47
stats.stackexchange.com
31
votes
Geometric interpretation of multiple correlation coefficient $R$ and coefficient of determination $R^2$
regression
correlation
multiple-regression
r-squared
geometry
asked Nov 12, 2014 at 1:07
stats.stackexchange.com
28
votes
Real life examples of distributions with negative skewness
distributions
skewness
teaching
asked Mar 7, 2014 at 16:33
stats.stackexchange.com
21
votes
Is the median a type of mean, for some generalization of "mean"?
mean
median
types-of-averages
asked Feb 11, 2015 at 11:16
stats.stackexchange.com
20
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, 2018 at 0:01
stats.stackexchange.com
17
votes
For which distributions is there a closed-form unbiased estimator for the standard deviation?
mathematical-statistics
standard-deviation
unbiased-estimator
asked Jan 5, 2015 at 23:19
stats.stackexchange.com
16
votes
When would we use tantiles and the medial, rather than quantiles and the median?
descriptive-statistics
quantiles
median
average
partial-moments
asked Feb 16, 2015 at 16:49
stats.stackexchange.com
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Top Answers
196
Correlation between a nominal (IV) and a continuous (DV) variable
stats.stackexchange.com
61
Geometric interpretation of multiple correlation coefficient $R$ and coefficient of determination $R^2$
stats.stackexchange.com
55
How do I change the background color of a plot made with ggplot2
stackoverflow.com
51
Generating random numbers manually
stats.stackexchange.com
51
"The total area underneath a probability density function is 1" - relative to what?
stats.stackexchange.com
44
How can the regression error term ever be correlated with the explanatory variables?
stats.stackexchange.com
41
Intuitive explanation of convergence in distribution and convergence in probability
stats.stackexchange.com
41
What does an Added Variable Plot (Partial Regression Plot) explain in a multiple regression?
stats.stackexchange.com
37
If my histogram shows a bell-shaped curve, can I say my data is normally distributed?
stats.stackexchange.com
36
In multiple linear regression, why does a plot of predicted points not lie in a straight line?
stats.stackexchange.com
35
The linearity of variance
stats.stackexchange.com
34
Graph for relationship between two ordinal variables
stats.stackexchange.com
33
Does mean = median imply that a unimodal distribution is symmetric?
stats.stackexchange.com
30
Is there any difference between $r^2$ and $R^2$?
stats.stackexchange.com
26
What is an example of perfect multicollinearity?
stats.stackexchange.com
26
How does one find the mean of a sum of dependent variables?
stats.stackexchange.com
24
What are some of the most common misconceptions about linear regression?
stats.stackexchange.com
24
Odds made simple
stats.stackexchange.com
22
How to prove that minimum of two exponential random variables is another exponential random variable?
math.stackexchange.com
22
Why are “time series” called such?
stats.stackexchange.com
22
What is the distribution of $R^2$ in linear regression under the null hypothesis? Why is its mode not at zero when $k>3$?
stats.stackexchange.com
21
Is using correlation matrix to select predictors for regression correct?
stats.stackexchange.com
21
Why shouldn't the denominator of the covariance estimator be n-2 rather than n-1?
stats.stackexchange.com
21
How to indicate that I've exceeded my planned spending for some time period, but am not completely lacking money
english.stackexchange.com
21
Labeling center of map polygons in R ggplot
stackoverflow.com
20
If X and Y are uncorrelated, are X^2 and Y also uncorrelated?
stats.stackexchange.com
20
Correlation between OLS estimators for intercept and slope
stats.stackexchange.com
20
Is standard deviation totally wrong? How can you calculate std for heights, counts and etc (positive numbers)?
stats.stackexchange.com
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
Real life examples of distributions with negative skewness
stats.stackexchange.com
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