Doubt with your answer
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)
Hey Kripa,
Please, refer to the following thread for an answer to your question:
https://365datascience.com/q/6e77ef38f3
Best,
365 Hristina
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?