Total product is simply the output that is produced by all of the employed workers. Marginal product is the additional output that is generated by an additional worker. With a second worker, production increases by 5 and with the third worker it increases by 6.
Definitions for doltish. Here are all the possible meanings and translations of the word doltish. Princeton's WordNet(5.00 / 1 vote)Rate this definition: cloddish, doltish(adj) heavy and dull and stupid.
O.E. unwis, unsnotor, ungleaw), also dol (from root of Ger. toll mad, related to Gk. tholeros muddy, turbid), and dysig (see dizzy). Stupid retained its association with stupor and its overtones of stunned by surprise, grief, etc. into mid-18c.