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BGonline.org Forums
Here's what I don't understand
Posted By: Timothy Chow In Response To: Here's what I don't understand (Tom Keith)
Date: Saturday, 26 September 2015, at 1:55 a.m.
Tom Keith wrote:
Suppose you are trying to decide what date to have your company picnic on and the whether data suggest a 4% chance of rain for July 27 versus a 12% chance of rain for September 27. I think that would be useful to know.
But suppose that the 4% and the 12% came from wildly unreliable models. Then getting the numbers 4% and 12% might be worse than useless if it led you to believe that the precision in the forecast implied that it was accurate to, say, plus or minus 5 percentage points, when it was nothing of the sort.
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