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CRA CDs Inc. wants the mean lengths of the "cuts" on a CD to be 135 seconds (2 minutes and 15 seconds). This will allow the disk jockeys to have plenty of time for commercials within each 10-minute segment. Assume the distribution of the length of the cuts follows the normal distribution with a population standard deviation of 8 seconds. Suppose we select a sample of 16 cuts from various CDs sold by CRA CDs Inc.
(a) What can we say about the shape of the distribution of the sample mean?
(b) What is the standard error of the mean? Standard error of the mean seconds.
(c) What percent of the sample means will be greater than 140 seconds?
(d) What percent of the sample means will be greater than 128 but less than 140 seconds?
A mine is for sale for $240,000. It is believed the mine will produce a profit of $65000 the first year, but the profit will decline $5000 a year after that, eventually reaching zero, whereupon the mine will be worthless.
Suppose the government decides to increase taxes by $30 billion in order to increase Social Security benefits by the same amount. How will this combined tax-transfer policy affect aggregate demand at current prices
Determine the Net Present Value of the cash flow at annual interest rates of 15%, 20%, and 30%. At what (interpolated) rate would the NPV become zero What is such a rate called Also, calculate the payback periods
A quality control inspector chooses a part to be tested. The part is then declared acceptable, repairable, or scrapped. Then another part is tested.
suppose in 2010, the cost of a market basket of goods was $2001. In 2012, the cost fo the same amrket basket of goods was $2,105. Calculate the price index for 2012, using the price index formula, asume 2010 is the base year________
Income Savings I(planned) Consumption 200 -20 60 400 0 60 600 20 60 800 40 60 1000 60 60 1. Fill in the last column. 2. The equilibrium level of income in this example is 3. According to this data, the marginal propensity to consume is .
Ten bidders in an oral auction have the following values for an antique clock ($10, $9, $8, $7, $6, $5, $4, $3, $2, $1). If bidders of the $10 and $9 bids collude and bidders of the $3, $4, and $5 bids collude, what will the winning price be?
Country B has 35000 units of labor and takes 7 units of labor to produce one unit of manufactures and 5 units to produce one unit of food. What is the price of manufactures in terms of food at which A and B would respectively supply manufactures.
Calculate the optimal amount of pretzels and soft drinks that minimizes this firm's costs and how many frames do you provide each month?
A monopolist faces a demand curve given by: P = 220 - 3Q, 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 $40. There are no fixed costs of production. How much output sho..
Given the following demand curve Q=100 - 2P determine the price elasticity of demand at the following prices. 1. P = 10, Elasticity = 2. P = 30 Elasticity = ?
janelle aand brian each plan to spend $20,000 on the styling and gas mileafe features of a new car. They can choose all styling, all gas mileage, or som combination of two. Janelle doesnot care at all about styling and want the best gas mileage po..
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