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Probelm:
(a) Differentiate between homoscedasticity and heteroscedasticity.
(b) Outline the reasons why the variances of disturbance term may vary.
(c) Given the 3 observations (1,4) , (2,6) and (3,7), with the true model being
Y = β_{1} + β_{2} X + u, solve the fitted line.
Assume the price elasticity of cigarettes is 0.25. By how much would prices have to increase to get a 20% reduction on smoking?
demand function(qd)=650-5p-p2 where p=10
Outdoor Travel Inc. needs to estimate the cost of capital for the evaluation of capital expenditures. A typical project is financed with 25% debt-to-value ratio (i.e., D/(D+E) = 0.
Explain the difference among the usual (product moment) correlation and rank correlation. In what situations is it more appropriate to use rank correlation?
Your firm will produce widgets for the next 10 years (starting at t=1). Annual revenue from selling widgets is $20,000. Production requires an initial outlay (at t=0) for machin
Consider a linear model to explain pricing of houses: Price = ß0 + ß1lotsize + ß2sqrft + ß3bdrms + u (1) E(u| lotsize, sqrft, bdrms)=0 Var (u| lotsize, sqrft, bdrms)=s2 lotsize4
goldfield quandt test solution
Problem: a) In what circumstances would you apply switching models? b) Using dummy variables for seasonality show how you would test for January effects in financial data?
This problem refers to Doughtery's Educational Attainment and Earnings Functions (EAEF) data set, accessible through the course website. This data is a subset of the U.S. National
what is the mathematical origin of durbin watson test for autocorrelation
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