This is one of the very oldest questions in philosophy. It is exhausted. There is nothing left to be done on it.
In this post didn't somebody mention Billy Graham and his explanation of prayers not being answered as gods way of saying NO? Those which are answered are called coincidences Please Register or Log in to view the hidden image!
There is Like when you read Your Stars in newspaper and think Yes that applies to me Problem It's all self fullfilling deception, all within your own mind Please Register or Log in to view the hidden image!
You are going to tell me , They studied god and god did not appear to them , Jesus come as the son of God and did miracles , the educated people did not believe him and they killed , I believe if He would come in our present time we would do the same . Tell me what sign would you like to see so that you would believe ?
How about JC doing a Superman impersonation? Bullets bouncing off his bare chest and flying around the parking lot would do it for me But that would be just a sideshow when he snaps his fingers and all the blind, sick and disabled are healed What sign would do it for you or have I already covered your wish list? Please Register or Log in to view the hidden image!
No, they didn't study God. They just studied whether praying for sick people helped them. It did not. I think if he came in our present time YOU would do the same. Jesus was a Nazarene, the lowest of the low; Nazareth was a tiny backwater town in Galilee. In fact, in the Scriptures, Nathaniel asks "can anything good come from there?" - because that's what a low opinion the people of the time had of his home. If he came today to the US he'd be an illegal immigrant from a town in Mexico working in construction. If he came from the Middle East he'd be a Syrian refugee, or something similar; an outcast dependent on the mercy of others. All the sorts people like you are working against, in other words. To believe he is like Christ? His works. To believe he is a supernatural being? Performing verifiable supernatural acts.
The experiment can be run in such a way as to account for that. There is little interpretation in one's medical history. And that's what was being prayed for, better outcomes from medical treatments. The average rate of good outcomes can be measured and used as the control group.