Challenge 2 There are four unit costs for furnishing and - TopicsExpress

Challenge 2 There are four unit costs for furnishing and installation of 12” diameter, Class III, reinforced concrete pipe in your unit cost database, for quantities ranging from 31 to 370 linear feet. Unit costs range from a minimum of $29.49/linear foot to $125.04/linear foot, with an average unit cost of $71.43/linear foot. Costs in the unit cost database reflect actual bid unit prices on unit price contracts. A logical explanation for the variation in unit prices is -------------------- A. One or more of the unit prices reflect errors on the part of bidder(s). B. Unit prices varying from the mean by more than one standard deviation should be eliminated from the database. C. One should utilize the mean unit price. D. Actual bid unit prices reflect the influence of many variables such as depth of bury of pipe, quantity of pipe installed, and unbalancing of bids.

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