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Q1. Suppose there are two elementary schools in a county. One school (A) loans all its students a laptop computer for use in classes. The other (B) does not. We would like to compare performance on a standardized test for the two groups of students.
There are 28 students randomly chosen from school A and 34 from school b. The average test score for A is 78, and for B are 75. The sample standard deviation for A is 7 and for B are 10. While the population variances are unknown, we will assume they are equal.
a. What is the 99% confidence interval for the difference between the two school's scores? (For consistency, let the difference d=A-B.)
b. Suppose we want to perform a two-tailed test where H0 is that μd=0. What is (approximately) the p-value of the test?
The United Nation's Department of Economic and Social Affairs, Population Division, tracks the total number of foreign-born people by nation.
The market demand and supply function for VCR movie rentals are: QD= 10 - 0.04p and QS 3.8P = 4. Calculate the equilibrium quantity and price.
Suppose it had begun an expansionary policy early in 1981. What does the text's analysis of the inflation unemployment cycle suggest about how the macroeconomic history of the 1980s might have been changed.
She is considering quitting her job and going to university full time for four years.
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Discuss industry concentration, demand and market conditions and the pricing behavior of Kodak in the 1990's. Do you think the industry environment is significantly different today.
Carefully explain the concept of the reaction function in duopoly analysis.
Suppose that the participation variable, voucher, is completely randomized in the sense that it is independent of both observed and unobserved factors that can affect the test score.
Expectations and consumer confidence are important in determining fluctuations in aggregate spending. In your opinion, what is the present status of consumer confidence.
The Solow Growth Model. In 2010, Japan was a large open economy with perfect capital mobility that was at its steady state.
The 2001 recession ended in November 2001, but the perception of "bad economic times" lingered into 2002 and 2003. What evidence do these graphs provide concerning the lingering perception of a recession.
The setup cost is $100 per order up to 99. For orders of less than a pallet, the setup cost is $200. The setup cost for pallet loads is $1000. The holding cost is 1% of the purchasing cost per item per week.
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