MCELESTINO ☆ Mexico, 20190103 22:05 (edited by mittyri on 20190105 02:33) Posting: # 19725 Views: 828 

In the results it is also evident that the posthoc statistical power (power_TOST) is less than 80%, this is because the estimated point is greater than 105%, considering that the sample size was estimated expecting a difference less than / equal to 5%. However, the statistical power of the ANOVA (Power_80_20) supports that the sample size used in the study was adequate, since the values are greater than 90%. This is true? Please follow the Forum’s Policy. [Mittyri] Please don’t shout. [Helmut] 
mittyri ★★ Russia, 20190104 00:24 @ MCELESTINO Posting: # 19726 Views: 702 

Hi, » In the results it is also evident that the posthoc statistical power (power_TOST) is less than 80%, this is because the estimated point is greater than 105%, considering that the sample size was estimated expecting a difference less than / equal to 5%. There are 3 basic factors in power calc: sample size, CV and PE. In posthoc analysis sample size is fixed, but do not forget about CV! So the conclusion is valid if CV is equal or less than expected » However, the statistical power of the ANOVA (Power_80_20) supports that the sample size used in the study was adequate, since the values are greater than 90%. I think it should go to the trash bin. That's a conclusion based on WNL output, right? See this old thread That 'magick power' is not a power of ANOVA (whenever it could be) but the result of equality test using delta = 20%. That test has much more power than PowerTOST, thus, the value is higher than the previous one. You cannot assess the sample size using that test. — Kind regards, Mittyri 
MCELESTINO ☆ Mexico, 20190104 19:18 (edited by mittyri on 20190105 02:36) @ mittyri Posting: # 19729 Views: 656 

Hi, » There are 3 basic factors in power calc: sample size, CV and PE. In posthoc analysis sample size is fixed, but do not forget about CV! So the conclusion is valid if CV is equal or less than expected If CV is higher than expected, What is the conclusion? Thanks Regards Edit: Standard quotes restored. [Mittyri] Please don’t shout. [Helmut] 
ElMaestro ★★★ Denmark, 20190104 21:39 @ MCELESTINO Posting: # 19730 Views: 650 

Hello McElestino, » If CV is higher than expected, » What is the conclusion? That is your conclusion. Or parts of it. — I could be wrong, but... Best regards, ElMaestro 