Why does the p-value double when using two-tailed test compared to one-tailed one?
27706
Explaining two-tailed tests
91753
t-test or z-test: assume normality or s≈σ?
4722
My distribution is normal; Kolmogorov-Smirnov test doesn't agree
117866
Calculating p-value using R
129932
Trying to understand what is a p value
157670
p-value approach - clarify teacher's solution?
62247
Why do my p-values differ between logistic regression output, chi-squared test, and the confidence interval for the OR?
72321
One-tail versus two-tail z-score
111953
Independent samples t-test with unequal sample sizes
82605
Why are the number of false positives independent of sample size, if we use p-values to compare two independent datasets?
50184
Doubling the tails in two-sample permutation test
4677
What is the meaning of p values and t values in statistical tests?
46759
Regarding p-values, why 1% and 5%? Why not 6% or 10%?
24672
Estimated probability looks too large, what I am doing wrong?
23963
Why is it possible to get significant F statistic (p<.001) but non-significant regressor t-tests?
86734
Why do I not get a p-value and F value from ANOVA in R?
21410
Comparing and contrasting, p-values, significance levels and type I error