"Lindsay" writes:

I would say that on average the forecast is 50% correct which obviously
means that they are wrong 50% of the time although never counted.

If you predict that tomorrow will be like today you're right more than
50% of the time.

--
Chris Malcolm +44 (0)131 651 3445 DoD #205
IPAB, Informatics, JCMB, King's Buildings, Edinburgh, EH9 3JZ, UK
[http://www.dai.ed.ac.uk/homes/cam/]