Welch’s t-test [Regulatives / Guidelines]
Hi Imph,
Welcome.
You could but it would be wrong. Since you must not assume equal variances and in your table the residual degrees of freedom n1+n2–2 are the ones of the conventional t-test.
You obtain also the p-value of the treatment difference (which is, however, not relevant in bioequivalence).
Cross-validated (‼) example codes are given as supplementary information to the publication mentioned in my last post:The first one should work also in Excel.
There is no excuse to use a flawed method.
❝ Thank you for your valuable response.
Welcome.
❝ Is it possible to conduct an analysis of variance according to the following table without assuming equality of variances?
You could but it would be wrong. Since you must not assume equal variances and in your table the residual degrees of freedom n1+n2–2 are the ones of the conventional t-test.
❝ Does Welch's correction only concern the calculation of confidence intervals?
You obtain also the p-value of the treatment difference (which is, however, not relevant in bioequivalence).
Cross-validated (‼) example codes are given as supplementary information to the publication mentioned in my last post:The first one should work also in Excel.
There is no excuse to use a flawed method.
—
Dif-tor heh smusma 🖖🏼 Довге життя Україна!
Helmut Schütz
The quality of responses received is directly proportional to the quality of the question asked. 🚮
Science Quotes
Dif-tor heh smusma 🖖🏼 Довге життя Україна!
Helmut Schütz
The quality of responses received is directly proportional to the quality of the question asked. 🚮
Science Quotes
Complete thread:
- Unequal variances in parallel design Imph 2022-06-20 16:16 [Regulatives / Guidelines]
- Welch’s t-test Helmut 2022-06-20 16:47
- Welch’s t-test Imph 2022-06-23 13:02
- Welch’s t-testHelmut 2022-06-23 14:19
- Welch’s t-test Imph 2022-06-26 10:06
- Read the paper, use the code(s)! Helmut 2022-06-26 12:12
- Welch’s t-test Imph 2022-06-26 10:06
- Welch’s t-testHelmut 2022-06-23 14:19
- Welch’s t-test Imph 2022-06-23 13:02
- Welch’s t-test Helmut 2022-06-20 16:47