Calculating sample size

G

Goocha

Guest
#1
Hello,
I am going to conduct a research and would like to estimate the sample size that I will need.
Here is the information that I have, please let me know if you need some more information.
Thanks in advance.

We know from previous research that the probability of phenomena in one group (control group) is 1.1% and in another independent group (research group) is 19.4%.
I would like to check, what are the differences between those 2 groups in several demographics characteristic by using t-test and non parametric test. Alpha of 0.05%

What is the sample size that I should take?
 
K

kumarnaidu

Guest
#2
You should consider the proportion difference or mean difference of your primary objective or outcome to estimate sample size.
 
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