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
STA2020S- Applied Stats (REGRESSION) R99,00
Add to cart
Quickly navigate to
Preview
  2.  
  3. University Of Cape Town (UCT)
  4.  
  5. (STA2020S)

Class notes

STA2020S- Applied Stats (REGRESSION)
 0 purchase

ALL THE NOTES YOU WILL NEED TO PASS THE SIMPLE LINEAR, MULTIPLE LINEAR REGRESSION & LOGISTIC REGRESSION SECTION IN THE EXAM. I put my blood sweat and tears into these notes. Second-year second-semester applied statistical science notes. Notes made from the lecture slides, textbook and l...

[Show more]
Last document update: 1 year ago

Preview 4 out of 55  pages

Document information

  • November 4, 2023
  • November 4, 2023
  • 55
  • 2023/2024
  • Class notes
  • Na
  • All classes

Subjects

Written for

Seller

avatar-seller
Gsnotes101

Reviews received

Content preview

Stats

,simple linear regression




statistical interference: attempt to reach conclusion concerning a complete set of observations
(population), but only using a subset thereof (sample)

hypothesis testing




Quantifying linear relationship between variables
Correlation analysis
> Objective: more descriptive
> Data: bivariate
> Describes:
direction (positive or negative) &
magnitude (strong or weak)
of the linear relationship between two variables.
> Note: correlation ≠ causation
Regression analysis
> Objective: emphasis on prediction
> Data: bivariate (simple) or
multivariate (multiple)
> Describes:
relationship between a dependent variable and one or more independent
the goal is to create a mathematical equation (regression equation) that predicts the value of the dependent variable
based on the values of the independent variables.
Basically regression analysis helps us understand how changes in the independent variables are related to changes in
the dependent variable.
> Uses: Independent variable(s) to estimate value of dependent variable

,Correlation analysis

> Sample correlation coefficient: estimate of 𝝆, used to measure strength of linear relationship in sampled observations
> Population correlation coefficient: measures strength of association between two variables




Properties of correlation coefficient:
> Unit free
> Bounded between -1 and 1




Perform correlation analysis in R



BACK TO EXAMPLE

, Significance of correlation coefficient

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 EFT, 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 this summary from?

Stuvia is a marketplace, so you are not buying this document from us, but from seller Gsnotes101. Stuvia facilitates payment to the seller.

Will I be stuck with a subscription?

No, you only buy this summary for R99,00. You're not tied to anything after your purchase.

Can Stuvia be trusted?

4.6 stars on Google & Trustpilot (+1000 reviews)

68175 documents were sold in the last 30 days

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

Start selling
R99,00
  • (0)
Add to cart
Added