Hello,

As part of my internship, I have to perform several tests. My dataset does not follow a normal distribution but I would like to compare my dataset in its entirety with a subsample that follows a normal one (this would allow me to see if the package I have to use later is robust or not). I don’t have much idea how I could do it, because the rnorm function for example generates random variables while I really want to select individuals from my dataset that follows a normal distribution. Do you have any idea?

(I hope my question is not too off-topic)

Thank you in advance for your answers

Edit : I have different size of fish's scales. Size doesn't follow a normal distribution. I want to do repeatability analyses according to a specific package. Normally this package could allow to do without the normality of my data but I want to check that this package is robust enough by taking a sample of my sizes that will follow a normal distribution. Finally, I'll compare the global result and the result with the sample. So maybe create a function that allow to choose the "normal" size not randomly