Is it possible to predict the CAT15 percentile from our estimated score by any of the percentile predictors available online?

Not really, no. "Studies show" whatever the buyers wanted them to.

Well, it is important to understand that the media often exaggerates or wrongly reports the results of scientific studies. If you really want to know, it is best to read whatever essay or article was published in a scientific journal. Also, it is important to examine how good the experiment/study was.

If it had lots of issues like small sample size, and not easily repeatable, then you should take the results with a grain of salt.

I cant really gove you an answer,but what I can give you is a way to a solution, that is you have to find the anglde that you relate to or peaks your interest. A good paper is one that people get drawn into because it reaches them ln some way.As for me WW11 to me, I think of the holocaust and the effect it had on the survivors, their families and those who stood by and did nothing until it was too late.