@Society "Only people who believe in God, or some other deity could attest to their prayers being answered or not."
Well, no I do not think that accurate. If intercessory prayers are indeed heard and answered by a deity, that is an effect that can be measured. Indeed, several studies have looked into this, and all have failed to show any positive correlation.
@ill-billym "Let us imagine what this world would be like if there wasn't actually a God, and he definitely wasn't answering any prayers at all. Just imagine how different that world would be compared to the one we live in today."
We do not have to imagine - that's precisely the world we live in today. If there were actually a god, one that answered prayers, that is something that would be immediately evident. Such a power would be materially manifest, would leave evidence, of which there is, erm, none. Your faith leads you to believe in such a god, in the power of prayer, and if that works for you, that is perfectly fine, but what you cannot assert is that such a world-view is the objective, material truth.