May 16, 2021 · 9 When you use a paired T-test, you are essentially doing a one-sample test, where your one sample consists of the paired differences between outcomes in two groups. If you create a new …

Aug 11, 2024 · I have a data sample of 190 but I have a few outliers and my data is not normally distributed. I intend to use paired T-test to evaluate the pre-post treatment over time. What should I …

One is to use an unpaired t-test, and the other is to use a paired t-test. My conjecture was that the distribution of p-values that one gets is the same in the two cases.

Mar 4, 2021 · I would like to perform a paired t-test on the 150 individuals, i.e, measuring their mean water consumption before and after the machine installation. I thought about making 3 individual …

Mar 16, 2024 · Don't bother with the difference scores, the paired t-test, or the ANCOVA. Difference scores are somewhat controversial to use, and both statistical tests are highly inflexible, in that they …

Oct 24, 2024 · The test does not consider the original paired data beyond taking the differences. Consequently, we would look at the differences being run through the one-sample t-test, not the …

Sep 23, 2018 · The common format of a data frame for peforming a Paired t-test in R is a given measurement divided in two columns, so that each row indicates a same subject or individual.

Jun 16, 2021 · A paired test for these fictitious data shown significance. We illustrate that the paired t test is the same as a one-sample t test of the differences. t.test(y2,y1, pair=T) Paired t-test data: y2 …

Nov 13, 2020 · As an exercise I wanted to perform a paired t-test manually in R to refresh a lecture I had in the past. Everything went well, but then I thought about calculating the power of this paired t-test …

Dec 10, 2022 · I have question regarding effect size for paired t test some textbooks and statistical software like spss use this formula Cohen′sd = d/SDofdifference to calculate effect size for paired t …