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Problem:
(a) Why is an error term added to a regression and explain its importance in the OLS procedure?
(b) Suppose we have a linear equation with a constant term, one explanatory variable and an error term, show in details the steps required, using the OLS procedure, to derive the estimates of the constant term and that of the coefficient of the explanatory variable.
(c) Suppose a researcher wants to test whether the returns on a company stock (y) show unit sensitivity to two factors (factor x2 and factor x3) among three considered. The regression is carried out on 144 monthly observations. The regression is: Yt = β1 + β2x2t + β3x3t + β4x4t+ ut
i) What are the restricted and unrestricted regressions?
ii) If the two RSS are 502.4 and 302.8 respectively, perform an F-test of the restriction, showing all the required steps.
(d) How are the t-test and the F-test related and describe in which cases they cannot be applied?
When measuring price levels in the economy (such as when calculating the CPI index), why is a weighted average used? Because we require giving greater emphasis to prices at whi
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Nucleic acids perform two important functions 1. Replication: It is the property of biomolecules to synthesise exact copy of it. DNA has this unique property of duplicating it
2ALBr3+3K2so4--->6KBr+1Al2(so4)3
Explain the Human Development Index Introduced by the UN in 1990, the index take into account not only the goods and services formed but also the ability of a population to use
Why has it been difficult to produce a single estimate of an environmentally adjusted or "greened" GDP? What are the two approaches that can be used to put a value on environmental
what are the criticisms of modern theory of rent?
Q. What do you meant by Payroll Tax? Payroll Tax:A tax which is levied on current employment or payrolls (collected either as a fixed amount per employee or as a percentage of
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