21) Crowding out, following an increase in government spending, results from (the exchange rate is the foreign exchange price of the domestic currency) A) higher interest rates and a lower exchange rate. B) higher interest rates and a higher exchange rate. C) lower interest rates and a lower exchange rate. D) lower interest rates and a higher exchange rate. 22) Crowding out […]
118.A responsibility report for a profit center will a.not show controllable fixed costs. b.not show indirect fixed costs. c.show noncontrollable fixed costs. d.not show cumulative year-to-date results. 119.The dollar amount of the controllable margin a.is usually higher than the contribution margin. b.is usually lower than the contribution margin. c.is always equal to the contribution margin. d.cannot be a negative figure. […]
41) Sharisse brags to her mother that her starting salary as a management trainee is $36,000, much higher than her mother’s starting salary of $21,000 as a management trainee several years ago. If the CPI the year Sharisse begins work is 181.2 and the CPI the year her mother started work was 109.1, Sharisse is A) wrong. Adjusting for price changes, her salary […]
61) Consider the basic AD/AS macro model in long-run equilibrium. A permanent expansionary AD shock has ________ price-level effect in the short run and ________ price-level effect in the long run. A) a positive; no B) a negative; no C) a positive; an even larger D) a positive; a smaller E) a negative; a positive 62) Suppose Canada’s economy is in a long-run equilibrium […]
51) The above figure shows a housing market with a rent ceiling equal to $1,000. In this figure, what area is equal to the resources lost due to search? A) area A B) area B C) area C D) area D E) area E 52) The above figure shows the market for DVDs. The government decides that all citizens deserve to watch affordable […]
31) Refer to Figure 5-1. The market equilibrium price is A) $30. B) $25. C) $20. D) 300 33) Refer to Figure 5-1. The efficient equilibrium price is A) $30. B) $25. C) $20. D) 300 35) Refer to Figure 5-1. At the efficient equilibrium A) economic surplus is maximized. B) economic surplus is minimized. C) economic surplus is zero. D) […]
11) The law of demand implies that, other things remaining the same, A) as the price of a cheeseburger rises, the quantity of cheeseburgers demanded increases. B) as the price of a cheeseburger rises, the quantity of cheeseburgers demanded decreases. C) as income increases, the quantity of cheeseburgers demanded increases. D) as the demand for cheeseburgers increases, the price of a cheeseburger falls. E) […]
71. Angelo’s is a locally run and operated pizza parlor. Last month, the restaurant broke-even when 400 pizzas were served. The average variable costs per pizza are $2.50 and fixed costs for the month totaled $6,000. What is the average selling price of a pizza? A. $15.00B. $12.50C. $17.50D. $6.00 72. Floyd’s Barbershop has fixed costs of $3,000 per month. Floyd currently breaks-even when it performs 400 haircuts a month. […]
21. The red line observed in the line spectrum for hydrogen has a wavelength of 656 nm. What is the frequency of this light in hertz (s–1)? A)4.57 ? 105 s–1D)2.18 ? 10–13 s–1 B)4.57 ? 1014 s–1E)1.97 ? 102 s–1 C)2.18 ? 10-6 s–1 22. The green line observed in the line spectrum for hydrogen has a wavelength of 486 nm. […]
11. Holt Products manufactures desktop computers. Management has determined that each computer has a standard labor cost of $75.00 when 5 hours of labor at a cost of $15.00 per hour are used. The static budget for the month of April showed an estimated production of 4,200 computers. During April, 4,500 computers were actually produced. The actual direct labor cost for each computer was $85.80 […]
Artificial Intelligence
Exercise 1 :
Which of the following are correct?
a. False |= True.
b. True |= False.
c. (A ∧ B) |= (A ⇔ B).
d. A ⇔ B |= A ∨ B.
e. A ⇔ B |= ¬A ∨ B.
f. (A ∧ B) ⇒ C |= (A ⇒ C) ∨ (B ⇒ C).
g. (C ∨ (¬A ∧ ¬B)) ≡ ((A ⇒ C) ∧ (B ⇒ C)).
h. (A ∨ B) ∧ (¬C ∨ ¬D ∨ E) |= (A ∨ B).
i. (A ∨ B) ∧ (¬C ∨ ¬D ∨ E) |= (A ∨ B) ∧ (¬D ∨ E).
j. (A ∨ B) ∧ ¬(A ⇒ B) is satisfiable.
k. (A ⇔ B) ∧ (¬A ∨ B) is satisfiable.
l. (A ⇔ B) ⇔ C has the same number of models as (A ⇔ B) for any fixed set of proposition symbols that includes A, B, C.
Exercise 2 :
You have a number of trucks with which to deliver a set of packages. Each package starts at some location on a grid map, and has a destination somewhere else. Each truck is directly controlled by moving forward and turning. Construct a hierarchy of high-level actions for this problem. What knowledge about the solution does your hierarchy encode?
Exercise 3 : 25 Points
In your local nuclear power station, there is an alarm that senses when a temperature gauge exceeds a given threshold. The gauge measures the temperature of the core. Consider the Boolean variables A (alarm sounds), FA (alarm is faulty), and FG (gauge is faulty) and the multivalued nodes G (gauge reading) and T (actual core temperature).
a. Draw a Bayesian network for this domain, given that the gauge is more likely to fail when the core temperature gets too high.
b. Is your network a polytree? Why or why not?
c. Suppose there are just two possible actual and measured temperatures, normal and high; the probability that the gauge gives the correct temperature is x when it is working, but y when it is faulty. Give the conditional probability table associated with G.
d. Suppose the alarm works correctly unless it is faulty, in which case it never sounds. Give the conditional probability table associated with A.
e. Suppose the alarm and gauge are working and the alarm sounds. Calculate an expression for the probability that the temperature of the core is too high, in terms of the various conditional probabilities in the network.
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