Suppose that we use the model Y = Xi + i, where E[i] = 0 and...
Fantastic news! We've Found the answer you've been seeking!
Question:
Transcribed Image Text:
Suppose that we use the model Y = Xi + i, where E[i] = 0 and Var(e;) = . In other words, there is no intercept in this model. This is called regression through the origin. (a) Find the least squares estimator for this model. (b) Show that is unbiased; that is, E[1] = 1. Note: To simplify the notation, we have written E[1] instead of E[ 1 | X,... Xn]. Because we've conditioned on Xi, you can treat X; as fixed (not random) in your calculations. (c) Suppose you use your estimator from (a), but the true model is actually Yi = Bo + BiXi ti, where o 0. Show that the estimator you derived in (a) is biased, and calculate the bias. (That is, calculate E[1] - B. Again, treat X; as fixed.) Suppose that we use the model Y = Xi + i, where E[i] = 0 and Var(e;) = . In other words, there is no intercept in this model. This is called regression through the origin. (a) Find the least squares estimator for this model. (b) Show that is unbiased; that is, E[1] = 1. Note: To simplify the notation, we have written E[1] instead of E[ 1 | X,... Xn]. Because we've conditioned on Xi, you can treat X; as fixed (not random) in your calculations. (c) Suppose you use your estimator from (a), but the true model is actually Yi = Bo + BiXi ti, where o 0. Show that the estimator you derived in (a) is biased, and calculate the bias. (That is, calculate E[1] - B. Again, treat X; as fixed.)
Expert Answer:
Related Book For
Business Statistics In Practice
ISBN: 9780073401836
6th Edition
Authors: Bruce Bowerman, Richard O'Connell
Posted Date:
Students also viewed these mathematics questions
-
"internet radios" for streaming audio, and personal video recorders and players. Describe design and evaluation processes that could be used by a start-up company to improve the usability of such...
-
Let A, B be sets. Define: (a) the Cartesian product (A B) (b) the set of relations R between A and B (c) the identity relation A on the set A [3 marks] Suppose S, T are relations between A and B, and...
-
Perhaps more surprising to Mr. Pitkin was a proposal by the VP of Marketing to make a major investment in market share by increasing promotional expenditures by $2.5 million during 1998-2000. Sales...
-
Over the circle X2 + Y2 (a) What is fY|X(y|x)? (b) What is E[Y|X = x]? otherwise.
-
After Chris completed the ratio analysis for S&S Air (see Chapter 3), Mark and Todd approached him about planning for next years sales. The company had historically used little planning for...
-
The company is committed to ethical conduct and has no tolerance for fraud and unethical behavior. There are some concerns about abuses in your department. Do you know anything about the concerns I...
-
Wenner Furnace Corp. purchased machinery for $279,000 on May 1, 2012. It is estimated that it will have a useful life of 10 years, salvage value of $15,000, production of 240,000 units, and working...
-
What type of cost does not change with changes in production volume?
-
If the Sommers had chosen the original 15-year, 6.25% mortgage proposal, how much tax shelter would they have lost (over the last five years) as compared to the 30-year, 7.25% mortgage?
-
A closed traverse was run from A to B, then C and back to A, with radiations made at B and C to Y and X respectively. The diagram below shows the reduced observations made at A and B and the field...
-
Pour ce qui est des suites de laccident de janvier 2000, la Cour observe quil ressort des lments du dossier que lactivit industrielle en question na pas t arrte par les autorits, qui ont continu ...
-
The Court recalls its case law in this regard in the sense that Article 21 of the American Convention protects the close relationship that the indigenous peoples have with their lands, as well as...
-
Suppose the central bank of your country increases reserves by purchasing $1 million worth of bonds from banks and that the banking system in your economy is in equilibrium. What will happen to the...
-
Following the global financial crisis in 2008, assets on the Federal Reserves balance sheet increased dramatically, from approximately \($800\) billion at the end of 2007 to over \($4\) trillion...
-
However, the Court is of the view that the issue is not whether the treaties relating to the protection of the environment are or are not applicable during an armed conflict, but rather whether the...
-
You are an investment manager for Simple Asset Management, a company that specializes in developing simple investment portfolios consisting of no more than three assets such as stocks, bonds, etc.,...
-
Inexhaustible collections of ONPOs are not required to be capitalized or depreciated, if certain criteria are met. Why is this so, and what accounting and reporting recognition, if any, is required...
-
The lifetimes of a particular brand of DVD player are normally distributed with a mean of eight years and a standard deviation of six months. Find each of the following probabilities where x denotes...
-
Explain how a stratified random sample is selected. Discuss how you might define the strata to survey student opinion on a proposal to charge all students a $100 fee for a new university-run bus...
-
What lour assumptions do we make about the simple linear regression model?
-
Identify a key position that you intend to make during your presentation. Using Table 14.2 as a guide, write out how you could use the PREP (PositionReasonsExamplePosition) method to effectively...
-
Identify a topic of interest. Create a storyboard to outline the titles, content, and related story line of your PowerPoint slides.
-
Create an electronic slide presentation for your topic of interest. Ensure that it conveys your key messages effectively.
Study smarter with the SolutionInn App