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THE NEXT QUESTIONS ARE BASED ON THE FOLLOWING INFORMATION:
Suppose you are interested in determining the factors that influence the time required to prepare a tax return.You develop the model Y = β0 + β1X1 + β2X2 + β3
+ β4X3 + β5X4 + β6(X1 ∙ X4) + ε,where Y is the amount of time in minutes,X1 is the income of the individual (in thousands of dollars),X2 is the age of the individual,X3 is the number of people living in the household,and X4 is a dummy variable that takes the value 1 if the individual owns his or her own home.After interviewing 40 accountants,you obtained
= 17.2 + 0.38x1 + 1.04x2 - 0.04
+ 2.15x3 + 0.11x4 - 0.22(x1 ∙ x4),
= 5.3,
= 0.13,
= 0.33,
= 1.51,
= 4.7,
= 0.05,and
= 0.07.
-What are your alternative hypotheses regarding the individual coefficients in this model? Explain.
Autopsies
Post-mortem examinations of a body to determine the cause of death or the extent of disease.
Complicated Grief
A type of grief that impedes a person’s future life, usually because the person clings to sorrow or is buffeted by contradictory emotions.
Past Marriages
Previous matrimonial unions that an individual has been a part of before the current one.
Detroit
A major city in the state of Michigan, known for its significant contribution to the American automotive industry.
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