Examen
Exam Questions Chapter 5
- Grado
- Institución
Introductory economics for finance
[Mostrar más]Vista previa 1 fuera de 15 páginas
Vista previa 1 fuera de 15 páginas
Añadir al carrito
Añadir al carrito
1 revisar
Por: mgspaargaren64 • 2 año hace
Vendedor
Seguir
jeanneau
Comentarios recibidos
Vista previa del contenido
Chapter 51. Which of the following assumptions are required to show the consistency, unbiasedness
and efficiency of the OLS estimator?
(i) E(ut) = 0
(ii) Var(ut) = δ2
(iii) Cov(ut, ut-j) = 0
(iv) ut ~ N(0, δ2)
(ii) and (iv) only
(i) and (iii) only
(i), (ii), and (iii) only
(i), (ii), (iii), and (iv) only
All of the assumptions listed in (i) to (iii) are required to show that the OLS estimator has the
desirable properties of consistency, unbiasedness and efficiency. However, it is not necessary
to assume normality (iv) to derive the above results for the coefficient estimates. This
assumption is only required in order to construct test statistics that follow the standard
statistical distributions – in other words, it is only required for hypothesis testing and not for
coefficient estimation.
2. Which of the following may be consequences of one or more of the CLRM assumptions
being violated?
(i) The coefficient estimates are not optimal
(ii) The standard error estimates are not optimal
(iii) The distributions assumed for the test statistics are inappropriate
(iv) Conclusions regarding the strength of relationships between the dependent and
independent variables may be invalid.
(ii) and (iv) only
(i) and (iii) only
(i), (ii), and (iii) only
(i), (ii), (iii), and (iv)
If one or more of the assumptions is violated, either the coefficients could be wrong or their
standard errors could be wrong, and in either case, any hypothesis tests used to investigate
the strength of relationships between the explanatory and explained variables could be
invalid. So all of (i) to (iv) are true.
3. What is the meaning of the term “heteroscedasticity”?
The variance of the errors is not constant
The variance of the dependent variable is not constant
The errors are not linearly independent of one another
The errors have non-zero mean
By definition, heteroscedasticity means that the variance of the errors is not constant.
Los beneficios de comprar resúmenes en Stuvia estan en línea:
Garantiza la calidad de los comentarios
Compradores de Stuvia evaluaron más de 700.000 resúmenes. Así estas seguro que compras los mejores documentos!
Compra fácil y rápido
Puedes pagar rápidamente y en una vez con iDeal, tarjeta de crédito o con tu crédito de Stuvia. Sin tener que hacerte miembro.
Enfócate en lo más importante
Tus compañeros escriben los resúmenes. Por eso tienes la seguridad que tienes un resumen actual y confiable. Así llegas a la conclusión rapidamente!
Preguntas frecuentes
What do I get when I buy this document?
You get a PDF, available immediately after your purchase. The purchased document is accessible anytime, anywhere and indefinitely through your profile.
100% de satisfacción garantizada: ¿Cómo funciona?
Nuestra garantía de satisfacción le asegura que siempre encontrará un documento de estudio a tu medida. Tu rellenas un formulario y nuestro equipo de atención al cliente se encarga del resto.
Who am I buying this summary from?
Stuvia is a marketplace, so you are not buying this document from us, but from seller jeanneau. Stuvia facilitates payment to the seller.
Will I be stuck with a subscription?
No, you only buy this summary for $3.50. You're not tied to anything after your purchase.
Can Stuvia be trusted?
4.6 stars on Google & Trustpilot (+1000 reviews)
45,681 summaries were sold in the last 30 days
Founded in 2010, the go-to place to buy summaries for 15 years now
Vistos recientemente
Notas de lectura ·
The Cardiac Cycle
Resumen ·
Neuroscience hoofdstuk 8
Resumen ·
Statistiek theorie
Resumen ·
stress management
