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RegisterStop estimating post hoc power! [Power / Sample Size]
posted by Helmut 
– Vienna, Austria, 2017-12-26 12:22 – Posting: # 18084
Views: 21,024
Hi kms,
» I'm getting surprising results always that I'm taking sample size with 80% power and by coming to the results always 98 Power it is reaching....How it is possible always?
If the irrelevant post hoc power is always 98%, I suspect a flaw in the software (or SAS macro).
If it is always higher than the one used in sample size estimation it may be a miscalculation – ineradicably “popular” in Indian CROs (see this post). Revise your procedures.
» I'm getting surprising results always that I'm taking sample size with 80% power and by coming to the results always 98 Power it is reaching....How it is possible always?
If the irrelevant post hoc power is always 98%, I suspect a flaw in the software (or SAS macro).
If it is always higher than the one used in sample size estimation it may be a miscalculation – ineradicably “popular” in Indian CROs (see this post). Revise your procedures.
—
Cheers,
Helmut Schütz
![[image]](https://static.bebac.at/img/CC by.png)
The quality of responses received is directly proportional to the quality of the question asked. ☼
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Cheers,
Helmut Schütz
The quality of responses received is directly proportional to the quality of the question asked. ☼
Science Quotes
Complete thread:
- Power is getting high kms.srinivas 2017-12-26 07:39
![[Mix]](https://static.bebac.at/img/mix.png "open in Mix view")
- Power is getting high? d_labes 2017-12-26 12:08
- Stop estimating post hoc power! Helmut 2017-12-26 12:22
- Stop estimating post hoc power! kms.srinivas 2017-12-26 13:00
- Stop estimating post hoc power! ElMaestro 2017-12-26 14:11
- Simulations Helmut 2017-12-26 15:51
- Simulations BE-proff 2017-12-27 06:53
- Simulations ElMaestro 2017-12-27 07:25
- Simulations Yura 2017-12-27 08:23
- Simulations kms.srinivas 2017-12-27 09:11
- Simulations Yura 2017-12-27 10:07
- α and 1–β Helmut 2017-12-27 12:57
- α and 1–β Yura 2017-12-27 13:33
- α and 1–β Helmut 2017-12-27 14:31
- α and 1–β Yura 2017-12-28 06:50
- Educate the IEC and regulators Helmut 2017-12-28 11:30
- α and 1–β Yura 2017-12-28 06:50
- α and 1–β Helmut 2017-12-27 14:31
- α and 1–β Yura 2017-12-27 13:33
- α and 1–β Helmut 2017-12-27 12:57
- “Forced BE” 101 Helmut 2017-12-27 12:23
- “Forced BE” 101 kms.srinivas 2017-12-27 12:41
- Would you be so kind answering our questions? Helmut 2017-12-27 13:02
- Would you be so kind answering our questions? kms.srinivas 2017-12-28 05:53
- Yes, but why? Helmut 2017-12-28 11:47
- Yes, but why? DavidManteigas 2017-12-28 16:59
- Optimists and pessimists Helmut 2017-12-28 17:33
- "normal" GMR setting d_labes 2017-12-28 18:57
- Example for discussion mittyri 2017-12-28 22:06
- Example for discussion Helmut 2017-12-28 22:33
- I prefer to play it safe Helmut 2017-12-28 22:10
- Example for discussion mittyri 2017-12-28 22:06
- "normal" GMR setting d_labes 2017-12-28 18:57
- Full ACK d_labes 2017-12-28 17:41
- About GMR 1.10 kms.srinivas 2017-12-29 13:20
- Better 0.95 or 0.90 Helmut 2017-12-29 16:18
- Optimists and pessimists Helmut 2017-12-28 17:33
- Yes, but why? Yura 2017-12-29 13:46
- Buffon's needle Astea 2018-01-20 23:55
- Buffon's needle Oleg777 2018-10-09 22:48
- 0.95 or 1.05 Helmut 2018-10-10 13:41
- Buffon's needle Helmut 2018-10-10 12:46
- Buffon's needle Astea 2018-10-11 23:14
- School maths Helmut 2018-10-12 01:10
- School russian Astea 2018-10-12 12:41
- Offtop: Umschrift der westlichen Eigennamen auf Russisch mittyri 2018-10-12 23:25
- School maths Helmut 2018-10-12 01:10
- Buffon's needle Astea 2018-10-11 23:14
- Buffon's needle Oleg777 2018-10-09 22:48
- Yes, but why? DavidManteigas 2017-12-28 16:59
- Yes, but why? Helmut 2017-12-28 11:47
- EEU? mittyri 2017-12-28 21:52
- EEU? Yura 2017-12-29 13:41
- EEU - pharmacokinetic equation??? mittyri 2017-12-29 14:11
- EEU? Beholder 2018-01-16 15:10
- EEU? Yura 2017-12-29 13:41
- Would you be so kind answering our questions? kms.srinivas 2017-12-28 05:53
- Would you be so kind answering our questions? Helmut 2017-12-27 13:02
- “Forced BE” 101 kms.srinivas 2017-12-27 12:41
- Simulations Yura 2017-12-27 10:07
- Simulations kms.srinivas 2017-12-27 09:11
- Simulations xtianbadillo 2018-01-18 22:22
- Simulations BE-proff 2017-12-27 06:53
- Stop estimating post hoc power! kms.srinivas 2017-12-26 13:00
- Numbers don't lie ElMaestro 2017-12-28 20:13
Ing. Helmut Schütz