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An effort to reduce energy costs, a major university has installed more efficient lights as well as automatic sensors that turn the lights off when no movement is present in a room. Historically, the cost of lighting an average classroom for 1 week has been $265. To determine whether the changes have signficantly reduced costs, the university takes a sample of 117 classrooms. They find that the average cost for 1 week is $247 with a standard deviation of $74. When testing the hypothesis (at the 5% level of significance) that the average energy use has decreased from the past, what is the test statistic? (please round your answer to 2 decimal places).
The exante real interest rate is based on _____ inflation, while the ex post real interest rate is based on _____ inflation. A) expected; actual B) core; actual C) actual;
What is the difference between an economic luxury and an economic necessity? Ans) An economic luxury is wasting land on pools huge garden, etc. An economic requirement is what y
derive balance of payment line graphically
How can consumers become better educated about the products they are considering for purchase? To what extent do you personally go to acquire the best information available?
You just inherited a house with a market value of $300,000, and do not expect the market value to change. Each year, you will pay $1,000 for utilities and $3,000 in taxes. You can
A cupcake store is located in a mall and is the only cupcake store in that mall. The demand schedule for cupcakes (per dozen) is given in the table below. If the marginal cost to p
Which is better meausute of welfare?
An attorney supplies 40 hours of work per week when her fee is $100 per hour but supplies 60 hours of work per week when her fee rises to $120 per hour. Using the midpoint formula,
1. Suppose the banking system has reserve of $750000, demand deposits of $2500000 and a reserve requirement of 20%. a. if the fed now purchases $125,000 worth of govt bonds from t
Face Tree manufactures artificial trees and flowers. There are about 100 workers who do the routine assembly work for pay ranging from $8 per hour to $15 per hour. They work in two
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