19 Apr 2024

Posted on:

01 Dec 2023

0

SST = 1245, SSR = 945, SSE = 300. What is the R-squared of this regression?

Give me correct answer with your explanation for this as follwoing was my method.

R_squared = 1 - (SSR / SST)

Instructor
Posted on:

01 Dec 2023

0

Hey Kripa,

https://365datascience.com/q/6e77ef38f3

Best,

365 Hristina

Super learner
Posted on:

19 Apr 2024

0

Hello Hristina,

The calculation of R-squared mentioned in this video is given as:

However, checking numerous contents online, I found that the formula for R-squared is:

I couldn't reach a conclusion on which one of the options was the right one, so I decided to go this route:

and it turns out that I got the answer correctly using this video as a guideline. Then I delved further to know why and how the rest of the internet could be wrong and I realised that the formula we are working with according to this video, for SSR is:

whereas, the formulas I see flying all around is:

I also did a calculation based on their derivation of SSR and their derivation of R-squared:

and the answers are the same.

My question is that when expressing myself in public, which method should I use? The conventional one or the one presented in this video?