amillionyears said I imagine some Christians might get a yes answer to their prayers 5 times a day.So it would be hard to put that down to chance,if that is what you are trying to say.
I am an atheist (which you might have already guessed), and if I want something nice to happen, I often think to myself "I hope this nice thing happens" (silly I know, I can't help it).
I sometimes sit at home thinking, "I wonder how my sister is", and the at that moment the phone rings and she has called me! This doesn't mean that a prayer has been answered, it means that I think about her quite a lot, and she calls sometimes, and on this occasion the two events happened at the same time (because it is statistically likely)!
Statistically, it would FAR more amazing if these two events never happened at the same time in my life. However, for the 999 in a 1000 times when I think of her, she doesn't call, I don't sit there thinking "hmmmm, that is another wish that hasn't happened", but for some reason it seems a surprise when they align.
If your example of people having prayers answered 5 times a day are things like: 1) Win the lottery, 2) Family member gets cured of illness, 3) Friend with brain damage gets 6 A's in her exams after only studying for 2 weeks, 4) Child walks at the age of 3 months, 5) I ran 20 miles with a broken leg; then I would agree, this is statistically VERY VERY unlikely and this could be good evidence for pray working. However if these are little things like my telephone call example (which happened to me yesterday), then you are unquestionably misunderstanding statistics. Also, I am amazed that god has got time to make my sister call me, but doesn't have time to save a sick child - god must be pretty crass.
The human brain is designed to spot patterns in the world. You see some stripes in the grass and you think - AHHHH TIGER, run! 99.9% of the time it probably isn't a tiger, but the fact you ran means that you survive on the 0.1% of the times when it is a tiger.
The irony is, that the whole reason why we have religion in the world (many of which do not agree with evolution), is directly because of the fact that evolution is all about survival of the fittest. The animals that didn't spot a pattern out of nothing and run from the imaginary tiger did not survive, and therefore those poor pattern matching brain characteristics were not passed to the next generation (making the species stronger)! This is what happened to the Dodo, which evolved in an environment where there were no natural predators (so it didn't need to spot potential threats) when humans turned up feeling a little peckish!