What precisely does "There is a 70% chance of rain tomorrow" mean?
If you offered me the choice of two "lottery tickets", one of which paid $30 if it rained tomorrow and one of which paid $70 if it didn't, I wouldn't care which one I took.
My question was about the probability of rain, not about what you would be willing to bet on. Besides, who's that "me", a perfect rational Homo Economicus or a real person? Offering bets to an idealized concept seems like an iffy idea :-)
Alternatively, what single concept from statistics would most improve people's interpretations of popular news and daily life events?