That's a great question. To do a power analysis, you have to pick some value that is different from the value in the null hypothesis. Your power is the probability that you can tell the difference between that value and hypothesized value. So in real life, you would choose a value based on the situation, your own experiences. There was no specific reason I chose 0.030 except it is close to 0.026 and it is higher (since the accusation is the my mortality rate is higher). But one could have chosen something further from 0.026 or closer to it. Closer is better, but it will increase your sample size.
Hi, Why did you choose 0.030? from where or which is the rationale for 0.030?
That's a great question. To do a power analysis, you have to pick some value that is different from the value in the null hypothesis. Your power is the probability that you can tell the difference between that value and hypothesized value. So in real life, you would choose a value based on the situation, your own experiences. There was no specific reason I chose 0.030 except it is close to 0.026 and it is higher (since the accusation is the my mortality rate is higher). But one could have chosen something further from 0.026 or closer to it. Closer is better, but it will increase your sample size.