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1. Summarize the problems with operational databases that limit their usefulness for BI applications.
2. What is an ETL system, and what functions does it perform?
3. What problems in operational data create the need to clean data before loading the data into a data warehouse?
4. What does it mean to transform data? Give an example other than the ones used in this book.
The sides of a triangle measure 5, 6 and 8 inches. Find the sides of a similar triangle if the side corresponding to the 6inch side of the given triangle is 9 inches
Suppose that Microsoft is the only producer of operating systems and Netscape is the only producer of Web browsers. Suppose also that nobody wants an operating system without a Web browser and nobody wants a Web browser without an operating system.
a) What is the price elasticity of demand for HP printers b) What is the cross-price elasticity with respect to commodity X Give an example of what commodity X might be. c) What is the cross-price elasticity with respect to commodity Z
the construction time for a bridge depends on the weather. the project is expected to take 250days if the weather is dry and hot. if the wather is damp and cool it will take 350days. otherwise, it is expected to take 300 days.
Two firms currently produce the goods q1and q2separately. Their cost functions are C(q1) =25 + q1, and C(q2) = 35 + 2q2. By merging, they can produce the two goods jointly with costs described by the cost function C(q1, q2) = 45 + q1+ q2.
Many states have passed laws that immunize owners of undeveloped land from liability if they open the land for recreational use. What outcome in (a) will result under this rule?
A monopolist faces a demand curve given by: P = 70 - 2Q, where P is the price of the good and Q is the quantity demanded. The marginal cost of production is constant and is equal to $6. There are no fixed costs of production.
Use the diagram for this exercise to draw a level of aggregate expenditures that would lead to an economy at an equilibrium, E, with a real GDP of $8 trillion.
What would have been the maximum possible difference between the interest rates on six-month lira and DM deposits? On three-month deposits? Do the answers surprise you? Give an intuitive explanation.
The Downtown Parking Authority of Tampa, Florida, reported the following information for a sample of 250 customers on the number of hours cars are parked and the amount they are charged. Number of Hours Frequency Amount Charged 1 20 $ 3.00 2 38 6...
Consider a firm that wishes to borrow Php 100,000 for one year. Suppose that there is a 20% chance that the firm will go out of business before the end of the year (repaying none of its debts) and an 80% chance
Bernie, the manager of the S& L who will make the lending decision, receives 1% of the firm's earnings. He believes that if the S& L loses money, he can walk away from his job without repercussions, although without compensation.
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