100% satisfaction guarantee Immediately available after payment Both online and in PDF No strings attached
logo-home
Previously searched by you
Previously searched by you
logo
ISYE 6414 - Midterm Exam Questions and Answers well Explained Latest 2024/2025 Update 100% Correct. $7.99
Add to cart
Quickly navigate to
Preview
  2.  
  3. ISYE 6414
  4.  
  5. ISYE 6414

Exam (elaborations)

ISYE 6414 - Midterm Exam Questions and Answers well Explained Latest 2024/2025 Update 100% Correct.
 0 purchase
  • Course
  • ISYE 6414
  • Institution
  • ISYE 6414

Regression Estimator Properties - Unbiasedness: This is the property that the expectation of the estimator is exactly the true parameter. What this means is that Beta_1_hat is an unbiased estimator for Beta_1 Model Parameter Interpretation - a positive value for Beta_1, then that's consistent wi...

[Show more]

Preview 2 out of 11  pages

Document information

  • September 1, 2024
  • 11
  • 2024/2025
  • Exam (elaborations)
  • Questions & answers

Subjects

Written for

  • ISYE 6414
  • ISYE 6414

Seller

avatar-seller
ACADEMICMATERIALS

Reviews received

Content preview

ISYE 6414 - Midterm Exam
Regression Estimator Properties - Unbiasedness: This is the property that the expectation of the
estimator is exactly the true parameter. What this means is that Beta_1_hat is an unbiased estimator for
Beta_1



Model Parameter Interpretation - a positive value for Beta_1, then that's consistent with a direct
relationship between the predicting variable X and the response variable Y



Regression Analysis - Regression analysis is a simple way to investigate the relationship between 2
or more variables in a non-deterministic way.



Response/Target Variable (Y) - This is a variable we're interested in understanding, modeling or
testing



This is a random variable. It varies with changes in the predictor(s)



2. Predicting/Explanatory (independent) Variables(Xs ~ X1, X2) - These are variables we think
might be useful in predicting or modeling the response variable



This is a fixed variable. It does not change with the response



Simple Linear Regression - We have a straight line which doesn't fit perfectly to the points



The objective is to fit a non-deterministic linear model between the predicting variable and Y.



In simple linear regression, we have 3 parameters to estimate.



Multiple Linear Regression - We can have a plane if we have two predictions

, Polynomial Regression - We are capturing a nonlinear relationship



Objectives of Linear Regression - 1. Prediction: We want to see how the response variable
behaves in different settings



2. Modeling: We are interested in modeling the relationship between the response variable and the
explanatory/predicting variables



3. Testing: We are also interested in testing the hypotheses of association relationships.



Simple Linear Regression Assumptions - • Linearity/Mean Zero Assumption: This means that the
expected value of the errors is zero



• Constant Variance Assumption: This means that the variance of the error term is equal to
sigma_squared is the same across all error terms



• Independence Assumption: This means that the error terms are independent random variables i.e.
deviances (response variables Ys) are independently drawn from the data generating process -- it cannot
be true that the model under-predicts Y for one particular case tells you anything or all about what it
does for any other case



• Normal Assumption: The errors are assumed to be normally distributed.



Linearity Assumption - A violation of this assumption will lead to difficulties in estimating 0 and
means that your model does not include a necessary systematic component



Constant Variance Assumption - This means that the model cannot be more accurate in some
parts and less accurate in other parts of the model. The variance has to be constant.



A violation of this assumption means that the estimates are not as efficient as they could be in
estimating the true parameters and better estimates can be calculated also results in poorly calibrated
prediction intervals

The benefits of buying summaries with Stuvia:

Guaranteed quality through customer reviews

Guaranteed quality through customer reviews

Stuvia customers have reviewed more than 700,000 summaries. This how you know that you are buying the best documents.

Quick and easy check-out

Quick and easy check-out

You can quickly pay through credit card or Stuvia-credit for the summaries. There is no membership needed.

Focus on what matters

Focus on what matters

Your fellow students write the study notes themselves, which is why the documents are always reliable and up-to-date. This ensures you quickly get to the core!

Frequently asked questions

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.

Satisfaction guarantee: how does it work?

Our satisfaction guarantee ensures that you always find a study document that suits you well. You fill out a form, and our customer service team takes care of the rest.

Who am I buying these notes from?

Stuvia is a marketplace, so you are not buying this document from us, but from seller ACADEMICMATERIALS. Stuvia facilitates payment to the seller.

Will I be stuck with a subscription?

No, you only buy these notes for $7.99. You're not tied to anything after your purchase.

Can Stuvia be trusted?

4.6 stars on Google & Trustpilot (+1000 reviews)

63950 documents were sold in the last 30 days

Founded in 2010, the go-to place to buy study notes for 15 years now

Start selling

Recently viewed by you

Package deal ·

(0)

RITE AID PTU FULL BUNDLE|| ACTUAL EXAMS|| 2024| FULL PACKAGED SOLUTION ( A+ GRADED 100% VERIFIED)

Exam (elaborations) ·

(0)

TCEQ: Class D water operator license Exam Questions and Answers Graded A 100% Verified 2024

Exam (elaborations) ·

(0)

QAL "B" License-Landscape Maintenance Pest Control Chpt 1 Questions and Answers 100% Correct!

Exam (elaborations) ·

(0)

PMHNP LMR Exam Review Questions and answers, verified./ LATEST EXAM PREDICTIONS UPDATES, APPROVED.

Exam (elaborations) ·

(0)

Psychotherapy with Children Final Exam 2024/2025 Questions With Completed & Verified Solutions.

Exam (elaborations) ·

(0)

Test Bank for Microbiology An Introduction 13th Edition Tortora Chapter 1 – 29-Grades A+-2023- 2024

Exam (elaborations) ·

(0)

NSG 3370 Pathopharmocology Lesson 2 (Latest 2024 / 2025) Questions & Answers with rationales

Exam (elaborations) ·

(0)

LETRS Unit 6 Assessment, All Sessions 1-6, comprehension & Midterm; Complete Solution guide_2023.

Exam (elaborations) ·

(0)

RN Adult Medical Surgical Online Practice 2023/2024 B Questions & Answers ( A+ Graded 100% Verified)
$7.99
  • (0)
Add to cart
Added