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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,and developed the model: Y = β0 + β1X1 + β2X2 + β3X3 + β4X4 + 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 get the following results:
= 17.2 + 3.8x1 - 1.04x2 + 2.15x3 + 15.1x4,
= 5.3,
= 0.13,
= 0.33,
= 1.51,
= 4.7,SSR = 164.2,SSE = 200.7,and R2 = 0.45.
-Develop a 95% confidence interval for the population slope β3.
Return on Investment
A measure of the profitability of an investment, calculated as the net income from the investment divided by the cost of the investment.
Residual Income
Income that continues to be generated after the initial effort or investment has been completed, often used in the context of investments or intellectual property.
Net Operating Income
A measure of a company's profitability from its ordinary, core operations, excluding expenses and incomes from financing and investing activities.
Investment
The allocation of resources, such as capital or time, in the expectation of generating an income or profit.
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