Sample size and margin of error in polls and surveys
39882
Why do political polls have such large sample sizes?
71380
Analysing pre-and-post intervention study with anonymous responses
43954
Downvotes versus close votes on questions
16194
Random Sample vs. As Large a Sample as Possible?
125656
Assessing group differences on multiple outcomes
124490
Cluster analysis on weighted survey data with continuous and categorical variables
46740
Transforming proportion data: when arcsin square root is not enough
134529
What is a reasonable sample size for correlation analysis for both overall and sub-group analyses?
64070
sample space and observational units
48775
Opinions on a statistical error in p values (re: standard deviations, t-test/Kruskal-Wallis) in a published study?
11953
Mann-Whitney U test with unequal sample sizes
31868
How biased is a statistical study in which sampling was purposely made without repeats?
13097
Confidence interval around binomial estimate of 0 or 1
141025
Estimate normal distribution from small sample with rankings
111742
Variance of sample variance?
98325
Sample size calculation for mixed models
9676
How to interpret error measures?