suppose that XY and Z are yointly oirtmiutedirandom yariab.pdf

•

0 j'aime•2 vues

suppose that X,Y, and Z are yointly oirtmiutedirandom yariables, that is, they are detined on the same sample space. suppose that we also have the following. E(X)=2Var(X)=2E(Y)=6Var(Y)=21E( z)=0Var(z)=18 Compute the values of the expressions below E(52Z)=5(23y+4X)=var(3Z)5=E(x2)=.

Formation

Contenu connexe

Plus de activecomputers1

Suppose that the TOEFL Writing score follows a Normal distribution with an average of 15 and a standard deviation of 2. A random sample of eight TOEFL test-takers is drawn. a) Provide a description of the most appropriate statistic. [2] b) Identify the sampling distribution of answer you have in part (a). [4] c) What is the probability that the average TOEFL Writing score of the eight randomly selected TOEFL test-takers.

Suppose that the TOEFL Writing score follows a Normal distri.pdf

activecomputers1

Suppose that the US dollarpound sterling exchange rate eq.pdf

activecomputers1

Suppose that the multiple linear regression model yi=xiT+ei holds for i=1,,n, where the ei are independent errors, with E(eiX=xi)=0 but, unlike the standard setting, with different variances Var( eiX=xi)=i2. a) Show that the OLS estimate ^=(XTX)1XTY is still an unbiased estimate of . That is, show that E[^X]= under the model assumptions. b) Write the variance matrix of the errors ei as a diagonal matrix, say , with diagonal elements (12,,n2). Show that Var(^)=(XTX)1XTX(XTX)1..

Suppose that the multiple linear regression model yixiT+ei .pdf

activecomputers1

Suppose that the marginal propensity to save is dyd5057y+8.pdf

activecomputers1

Suppose that the heights of adult women in the United States.pdf

activecomputers1

Suppose that the annual rainfall in Ferndale California is.pdf

activecomputers1

Suppose that the annual rate of return for a common biotechn.pdf

activecomputers1

Suppose that, during the course of human history, whales have evolved to be better able to avoid human hunters. Given what you know about evolution, which one of these things likely played the biggest role in contributing to this evolutionary process? Whales that happened to have genes that allowed them to stay underwater longer survived. These whales then passed those genes on to their offspring. Some whales were better at having offspring than other whales. This caused them to stay underwater longer (where they were harder for people to find). As whales were being hunted, some of them underwent mutations that allowed them to stay underwater longer (where they were harder for people to find)..

Suppose that during the course of human history whales hav.pdf

activecomputers1

Suppose that temperatures in C of the last 10 days in Tab.pdf

activecomputers1

Suppose that an individual has a Utility function represente.pdf

activecomputers1

Suppose that an airfine uses a seat with of 168 in Assume .pdf

activecomputers1

Suppose that, for n observations y1,,yn, we have specified a multiple linear regression model of the form yi=0+1xi1+2xi2+ei where the ei are uncorrelated errors, with E(eiX)=0 and Var(eiX)=2. Consider the situation where we are interested not in the values of the coefficients 1 and 2 separately, but instead in their difference =12. a) Show that the estimator ^=^1^2 is an umbiased estimator of . That is, show that E(^X)= b) Derive an expression for the variance of this estimator, Var(), in terms of the relevant entries of the variance-covariance matrix Var(), where is the OLS estimator of =(0,1,2)T..

Suppose that for n observations y1yn we have specified .pdf

activecomputers1

Suppose that Jill Leonard Tavello, the Vice President of Culture and Communication for Stew Leonard's, wanted to track the effectiveness of the fufure Leader Program at Stew Leonard's. Which of the following metrics would be effective for this analysis? Check all that apply. Annual cost of the program Success rates of individuals promoted Organizational profitability Tumover rates for individuals that go through the program According to the Nine-Box Talent Grid, which one of the following employees is most likly to get put into the Ficure Leader Program at 5 tew Leonard's? A future star A consistent star A current star A key player.

Suppose that Jill Leonard Tavello the Vice President of Cul.pdf

activecomputers1

Suppose that 42 of primary care doctors think their patient.pdf

activecomputers1

Suppose N > 0 firms make a simultaneous and one-time entry decision whether to enter a new market. Entry requires expending a sunk cost E 0, and entering firms produce homogeneous products. If only one firm enters, then it is a monopolist that earns profit M > 0, not counting the entry cost. If more than one firm enters, then severe price competition leads each entering firm to earn 0 profit, not counting the entry cost. Assume that E < M , so that entry can possibly be profitable. Specify a firms probability of entry in a Nash equilibrium of the game in which all firms enter with the same probability.

Suppose N gt 0 firms make a simultaneous and onetime entr.pdf

activecomputers1

Suppose new data on GDP is released It tells us that GDP gr.pdf

activecomputers1

Suppose Margie is engaged to Dennis on April 16, 2025. Dennis wants to accumulate funds for retirement. He will save $300 per month for the 30 years following their marriage. Assuming monthly compounding. If he earns a constant return of 8%. Now suppose that Dennis is unlucky and earns a -16% return for the first five years of his investment. Then the market rebounds and produces 12.8% for the remaining 25 years of his investment. What was his arithmetic average rate of return on his investment in this case?.

Suppose Margie is engaged to Dennis on April 16 2025 Denn.pdf

activecomputers1

Suppose Leah withdraws $7,500 from her money-market mutual fund and deposits this money into her son's chequing account at a chartered bank. Then A.both M2 and M2+ will increase by $7,500. B.the values of M2 and M2+ will remain unchanged. C.M2 will decrease by $7,500, but M2+ will increase by $7,500. D.M2 will increase by $7,500, and the value of M2+ will stay the same. E.both M2 and M2+ will decrease by $7,500..

Suppose Leah withdraws 7500 from her moneymarket mutual f.pdf

activecomputers1

Plus de activecomputers1 (18)