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Suppose that X and Y are random variables such that E(X) = 4, E(Y) = 2 and var(X) = var(Y) = 4. Let Z=X+Y. 1. Find E(Z) (1 dp) 2. Assuming that X and Y are statistically independent find var(Z) (1 dp) 3. Assuming that cov(X,Y) = 2 find var(Z) (1dp)
There is a big gap in the earnings of married women and married men, even if individuals of both sex have the same level of education.
Determine the Herfindahl index for an industry composed of three companies one with 70% of the market, and the other two with 20 and 10 percent of the market respectively one company with 50% share
Computing regression lines, coefficient of squares, graphing dependent and independent variables using square footage vs home sales.
We have three variables, Information is 2000-2005. I use OLS to Determine the model and get a standard result.
Industry structure is often measured by computing the Four Firm Concentration Ratio. Assume you have an industry with 20 companies and the CR IS 30 percent.
Suppose you have some information on a sample of investment bankers, and are interested in impacts of height and of seniority on their success.
Draw a histogram of household size variable. On the histogram, mark in the mean and median. Comment on the shape of the distribution and what are the mean and standard error of your sampling distribution
Rubax, a United States producer of athletic shoes, estimates the following linear trend model for shoe sales:
When will America's longest running economic expansion in history come to an end? One way to predict is to look at what happened in the past. The usual causes include:
Use a Keynesian 45-degree diagram to show the effect of an increase in government spending and how could a reduction in tax rates increase government's tax receipts?
The sales information for the Lonestar Sports Apparel Corporation for the last 12 years as follows:
According to the following economic indicators, estimate the outlook of this fictitious economy. Although I know what these indicators mean,
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