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A researcher wished to estimate the difference between the proportion of users of two shampoos who are satisfied with the product. In a sample of 400 users of Shampoo A taken by this researcher, 78 said they are satisfied. In another sample of 500 users of Shampoo B taken by the same researcher, 92 said they were satisfied.
Construct a 90% confidence interval for the true difference between the two population proportions.
Based on your answer in (a), what would be your response at ".1 to the claim that there is no difference in customer satisfaction between the two shampoos?
Matt is a 25 year old engineer, and his salary next year will be $60,000. Matt expects that his salary will increase at a steady rate of 5% per year until his retirement at age 65. If he saves 10% of his salary each year and invest these savings a..
You estimate that the price elasticity of demand for clinic visits is ?0.25. You anticipate that a major insurer will increase the copayment from $20 to $25. This insurer covers 40,000 of your patients, and those patients average 2.5 visits per ye..
second quarter on strong organization wide sales growth, beating Wall's Street's expectations. What happened to their stock after the announcement.
A woman made 10 annual end-of-year purchases of $1000 worth of common stock. The stock paid no dividends. Then for 4 years she held the stock. At the end of the 4 years she sold all the stock for $28,000.
When is international job an opportunity for workers. When is it a threat to workers. What are some of the major challenges confronting the international trading system.
Calculate the total contribution margin generated by the normal volume of medium pizzas in a week.
The opening statement on the Web site of the Organization of Petroleum Exporting Countries says, "OPEC's eleven members are all developing countries whose economies are heavily reliant on oil export revenues. THey therefore seek stable oil prices ..
Find algebraic expressions for the total product of labor function TP(L), the average product of labor AP(L), and the marginal product of labor MP(L).
How does the share of income spent on each good change with pb? If consumers' preferences defined by a Cobb-Douglas utility function, what does your result suggest about their expenditure patterns?
Explain how are the Bank of Canada's transactions in the foreign exchange market from part (a) reflected in the balance of payments account.
a) If the Fed requires banks to hold 5% of deposits as reserves, how much in excess reserves does First national now hold b) Assume that all other banks hold only the required amount of reserves.
State are you for or against free trade. Are you for or against NAFTA? What is the economic basis for trade
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