I know, the problem is that she was evidently entirely unaware that without knowing something about the probability of "answered prayers" absent the prayer jar,

I know, the problem is that she was evidently entirely unaware that without knowing something about the probability of "answered prayers" absent the prayer jar, the simple "over half of all wishes came true" was entirely meaningless. Without more information any number could, potentially, support either conclusion (did/did-not work). This wasn't said in jest, either, if you're wondering (I did).