I have stumbled across a bit of an annoying problem. I am trying to perform multiple independent sample t-tests at once, grouped by a value. To put it into an example: In 5 cities we have measured...

I'm running a weighted t test in Python and am seeing different results. It appears that the issue is the degree of freedom calculation. Would like to understand why I'm seeing different outputs. ...

I have a simple question. I've seen this behaviour in R for both t-tests and correlations. I do a simple paired t-test (in this case, two vectors of length 100). So the df of the paired t-test sh...

Given a list of values: >>> from scipy import stats >>> import numpy as np >>> x = list(range(100)) Using student t-test, I can find the confidence interval of the dis...

I am stuck at performing t.tests for multiple categories in Rstudio. I want to have the results of the t.test of each product type, comparing the online and offline prices. I have over 800 product ...

I run regressions over two groups with the same independent variables. Then, I would like to test whether the slopes from the two regressions are significantly different. I have read that when the...