Hi,

I've just started looking at Probability Models, so excuse the newbie question but it seems a fundamental one to me.

In the Wet Grass/Sprinkler/Rain Model, the CPT values for the Rain node are 0.8 and 0.2 when Cloudy = true.

Now I get that the probability of rain is higher when it is cloudy, but where does the value of 0.8 come from? Why not 0.75?

Thanks.