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A math test of 100 questions was given to a random sample of 20 freshman. Suppose that for the population of freshman the distribution of number of correct answers would be normal with a variance of 250.
a) what is the probability that the sample variance would be less than 100?
b) what is the prob. that the sample variance would be more then 500?
Alpha and Beta, two tiny islands off the east coast of Tricoli, produce pearls and pineapples. The following production possibilities schedules describe in their potential output in tons per years. Do not graph or illustrate - only provide numerica..
what extra semiannual expenditure for five years would be justified for the maintenance of a machine in order to avoid an overhaul costing $3000 at the end of five years. assume nominal interest rate of 8% componded semiannually.
you have $750,000 in an IRA (individual ritirement account) at the time you retire. You have the options of investing this money in two funds. Fund A pays 2.9% annually and fund B 7.9% annually. How should you divide your money between Fund A and ..
Illustrate the consumer's opportunity set in a carefully labeled diagram. Show how the consumer's opportunity set changes when the price of good X increases to $10. How does this change alter the market rate of substitution between goods X and Y
suppose you owe $1,100 on your credit card. the annual percentage rate is 18% compounded monthly. the credit card company says your minimum monthly payment is $ 19.80 a. if you make only this minimum payment, how long will it take for you to repay ..
as the exclusive carrier on a local airline route, a regional airline must determine the number of flights it will provide and the fare it will charge. Taking into account operating and fuel costs, airport changes, and so on, the estimated cost pe..
Explain the term demerit goods and give examples of this and what are externalities? What are positive and negative externalities?
Total Total Average Fixed Variable Total Total Marginal Quantity Cost Cost Cost Cost Cost 0 $40 0 40 X X 1 40 55 95 95 55 2 40 75 115 57.50 20 3 40 90 130 43.33 15 4 40 110 150 37.50 20 5 40 135 175 35 25 6 40 170 210 35 357 40 220 260 37.14 50 8 40 ..
suppose that a researcher discovers that a measure of the total amount of debt in the U.S economy over the past 20 years was a better predictor of inflation and the business cycle than M1 or M2. does this discovery mean that we should define money..
The economy of Sonrisa has 1000 people in three income categories: poor, middle class, and rich. The poor ear $500 per year and have to spend it all to meet their consumption needs. The middle class earn $2,000 per year, of which $1,500 is spent a..
Online Educators (OE), a not-for-profit firm exempt from taxes, is considering replacement of some electronic equipment associated with its distance learning (DL) facility. They spent $100,000 on the equipment 3 years ago and have depreciated it t..
Gold Trackers watching the value of precious metals and has daily information on prices and sales of gold for the last many years.
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