Statistics help

[mattflint50]

Im doing a Minitab project, and my teacher asked me to include in it "How much of my data can be accounted for with my observations". Can someone explain this to me, because i have no idea how to answer this. I've found the correlation, regression equation, r, r^2, and ive also done a few interpolations and extrapolations. Just need help with the question. Thank you for any help

 

[tkhunny]

What a strange question. A couple things come to mind.

Is it a finite population? How big is your sample, compared to your population?

Is it a continuous distribution? If so, the answer probably should be zero (0).

Maybe it was meant "How much of your VARIATION can be Explained by the treatment you are suggesting?" That would be r², of course.

 

[mattflint50]

I think your right about the question. It was in fact "How much of your VARIATION can be Explained by the treatment you are suggesting?" So your saying all i have to do is take r which equals -.507 and sqaure that and it will give me the answer?

 

[tkhunny]

Bingo!

(If that's how you calculate r² for this case, anyway.)