Re: Shingle Color Choice. Just some additional food for thought from the FSEC. This is just one paragraph out of a 67 page report. I disagree with the final findings of this labratory approach method of determining heat gain or loss dependant upon shingle color alone.
Definition of concrete. 1 : naming a real thing or class of things the word poem is concrete, poetry is abstract. 2 : formed by coalition of particles into one solid mass. 3a : characterized by or belonging to immediate experience of actual things or eventsb : specific, particular a concrete proposalc : real, tangible concrete evidence.
Introduction to Dummy Variables Dummy variables are independent variableswhich take the value of either 0 or 1. Just as adummy is a stand-in for a real person, inquantitative analysis, a dummy variable is anumeric stand-in for a qualitative fact or a logicalproposition.