Regression Analysis Questions Assignment Help
1.a)Explain the difference between a deterministic and a probabilistic model.
b). Give an example of a dependent variable y and two or more independent variables that might be related to y deterministically.
c). Give an example of a dependent variable y and two or more independent variables that might be related to y in a probabilistic fashion.
2.a)Explain the difference between linear and nonlinear relationships between two variables.
b)Explain the difference between a simple and a multiple regression model.
c)Briefly explain the difference between a deterministic and a probabilistic regression model.
3.a) Explain the meaning of the words simple and linear as used in simple linear regression.
b)Explain the meaning of independent and dependent variables for a regression model.
c)Explain the difference between exact and nonexact relationships between two variables.
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4.a)What are the degrees of freedom for a simple linear regression model?
b)Explain the meaning of coefficient of determination.
c)Explain the meaning of SST and SSR. You may use graphs for illustration purposes.
5.a)Why is the random error term included in a regression model?
b)Explain the least squares method and least squares regression line. Why are they called by these names?
c)Explain the meaning and concept of SSE. You may use a graph for illustration purposes.
6.a)Explain why the random error term ϵ is added to the regression model.
b)Explain the difference between A and a and between B and b for a regression model.
c)Briefly explain the assumptions of a regression model.
d)Briefly explain the difference between the population regression line and a sample regression line.
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