Timeline for Reproducing t-test in R gives different result than built-in function
Current License: CC BY-SA 4.0
7 events
| when toggle format | what | by | license | comment | |
|---|---|---|---|---|---|
| Nov 20, 2018 at 11:04 | vote | accept | Viktor Rosenfeld | ||
| Nov 20, 2018 at 1:54 | comment | added | Glen_b | @Ben There are indeed variants of Welch-Satterthwaite. | |
| Nov 19, 2018 at 13:22 | comment | added | Ben Bolker | I knew it was Welch, but I may have been looking too quickly at the formula. | |
| Nov 19, 2018 at 13:18 | comment | added | Neeraj | This is Welch's t-test, which does not assume variance are equal for both the group. | |
| Nov 19, 2018 at 13:17 | comment | added | Neeraj | I used wikipedia formula, and it exactly replicate the R result. | |
| Nov 19, 2018 at 13:16 | comment | added | Ben Bolker | at first glance, Wikipedia's Welch test df formula appears to be different. I wonder if there are different variants ... ??? | |
| Nov 19, 2018 at 13:14 | history | answered | Neeraj | CC BY-SA 4.0 |