Dear Alpna In sample size calculation, we start with some baseline assumptions about the population. This we get either from earlier study on nearly similar population or doing a small study /pilot testing on own population of interest or taking experts opinion if earlier two not possible..These baseline assumption we also called as expected vaues..like expected proportion, expected mean
Good explanation but madam you are recalculating the already calculated sample size rather calculating a new sample size using the findings of the previous studies. It would be much better if for each example you extract the data from the findings of the previous studies for new sample size calculation as many of the terms are not clear. like what is expected SD or combined SD. this is just justification and verification of already calculated sample sizes.
Very nicely illustrated. Awesome
How do you decide difference between means vs superiority margin , if both are clinically relevant only?
Very well explained concepts thank you and please what is effect size.?
Mam pls tell about expected standard deviation. Still not able to understand it.
Dear Alpna
In sample size calculation, we start with some baseline assumptions about the population. This we get either from earlier study on nearly similar population or doing a small study /pilot testing on own population of interest or taking experts opinion if earlier two not possible..These baseline assumption we also called as expected vaues..like expected proportion, expected mean
Good explanation but madam you are recalculating the already calculated sample size rather calculating a new sample size using the findings of the previous studies. It would be much better if for each example you extract the data from the findings of the previous studies for new sample size calculation as many of the terms are not clear. like what is expected SD or combined SD. this is just justification and verification of already calculated sample sizes.
Agree..We are planning a sample size series using G power..There we will go by this approach...
@@meritindia7032 please send me the link for that.. thanks
446