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Question: What would be your answer to the following queries?
(a) My regression program refuses to estimate four seasonal coefficients when I enter the quarterly data including a zero-one dummy for each quarter. What am I supposed to do?
(b) I estimated a model with a zero-one dependent variable using the logit and probit programs. The coefficients I got from the probit program were all smaller than the corresponding coefficients estimated by the logit program. Is there something wrong with my programs?
(c) I have data on medical expenditures on a sample of individuals. Some of them, who did not have any ailments, or did not bother to go to the doctor even if they had ailments, had no expenditures. I wish to estimate the income elasticity of medical expenditures. I am thinking of dropping the individuals with zero expenditures and estimating the model by OLS. My friend says that I would be overestimating the income elasticity by doing this. Is she correct?
1. The 3 types of integer programming models are total, 0 - 1, and mixed. 2. In a mixed integer model, all decision variables have integer solution values.
Identify two adequate size metrics for the product or service of your choice. Provide a description of each size metric and explain why they would be reliable.
For ordered pairs of real numbers ( a, b ) and ( c, d ), what drawbacks are there to de?ning multiplication of complex numbers by ( a, b )( c, d )= ( ac, bd )?
Figure shows two empirical CDFs of the residuals of Sales for two regressions. Estimate (roughly) the 0.20 and 0.80 fractiles of both of these empirical CDFs.
Find the corresponding transfer function - To identify this transfer function, an artificial heart is implanted in a calf while the main parts of the original heart are left in place.
An architect is designing an office building that is 120 feet by 72 feet. The architect wishes to use prefabricated rectangular panels to construct the outside walls. If the same size panels are to be used on all sides of the building what is the ..
Determine the optimal project selection using the Management Scientist software, including the projects to included and the total net present value contribution. Provide a narrative that explains the Management Scientist solution used.
Feedback for the robot arm is to be generated by a Kalman-Bucy filter with direct measurement of x1(t), and Compute the eigenvalues and eigenvectors.
In one section, cable runs from the top of one tower down to the roadway, just touching it there, and up again to the top of a second tower. The towers stand 40 inches apart. At a point between the towers and 10 inches along the road from the base..
Math 571 Programming Exercise Assignment. You should not explicitly form the stiffness matrix A. Instead, if you need to compute a matrix vector multiplication Ax, where x is an arbitrary vector, you should instead use the stencil form as above. In..
Consider the tree solution for the following minimum cost network flow problem: The numbers on the tree arcs represent primal flows while numbers.
Do the sample data indicate a significant change in depression (2-tailed test)? Test with alpha = .05, 2-tailed test
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