Engineering Economy (17th Edition)
Engineering Economy (17th Edition)
17th Edition
ISBN: 9780134870069
Author: William G. Sullivan, Elin M. Wicks, C. Patrick Koelling
Publisher: PEARSON
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Chapter 12, Problem 19P
To determine

Calculate the standard deviation.

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There are four estimates made for the anticipated cycle time to produce a subcomponent. The estimates, in seconds, are 10, 20, 30, and 70. If the first two estimates have equal weights, which total 70%, and the last two are weighted equally with the remaining 30%, what is the expected time?
Revenue into the general fund of the state of Texas for any biennium is highly dependent on the price of oil. At a price average of $50 per barrel, general revenue will be $95 billion. At $68 and $75 per barrel, the revenue will be $118 billion and $125 billion, respectively. If the chances are estimated at 10%, 35%, and 55% for oil prices of $50, $68, and $75 per barrel for the next biennium, respectively, the expected revenue (in $ billion) is closest to: (a) $117.38 (b) $118.02 (c) $118.92 (d) $119.50
Thermtech Science has performed an economic analysis of proposed service in a new region of the country. The three-estimate approach to sensitivity analysis has been applied. The optimistic and pessimistic values each have an estimated 15% chance of occurring. Use the FW values shown to determine the expected FW. Optimistic Most Likely Pessimistic FW value, $ 200,000 40,000 −25,000
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