ISYE 6414 - Midterm Exam Guide: All questions and Solutions Provided
9 views 0 purchase
Course
ISYE 6414
Institution
ISYE 6414
ISYE 6414 - Midterm Exam Guide: All questions and Solutions Provided
Regression Analysis - ANS Regression analysis is a simple way to investigate the relationship between 2 or more variables in a non-deterministic way.
Response/Target Variable (Y) - ANS This is a variable we're interested...
, Regression Analysis - ANS Regression analysis is a simple way to investigate the
relationship between 2 or more variables in a non-deterministic way.
Response/Target Variable (Y) - ANS 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) - ANS These are
variables we think might be useful in predicting or modeling the response variable
M
This is a fixed variable. It does not change with the response
Simple Linear Regression - ANS We have a straight line which doesn't fit perfectly to
the points
AO
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 - ANS We can have a plane if we have two predictions
Polynomial Regression - ANS We are capturing a nonlinear relationship
N
Objectives of Linear Regression - ANS 1. Prediction: We want to see how the
response variable behaves in different settings
JP
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 - ANS • 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
The benefits of buying summaries with Stuvia:
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
You can quickly pay through credit card or Stuvia-credit for the summaries. There is no membership needed.
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 JPNAOMISTUVIA. Stuvia facilitates payment to the seller.
Will I be stuck with a subscription?
No, you only buy these notes for $9.99. You're not tied to anything after your purchase.
