I'm not sure if I should have posted this under statistics or advanced statistics so if this question is placed incorrectly, I am sorry.
The question shows 2 scatter diagrams
I can't upload the pictures as Im using my mobile but i'll just describe how they kinda look
scatter diagram 1: the points form a very straight line
scatter diagram 3 : the points form a somehow straight line but not as straight as scatter diagram 1
Both scatter diagrams do not have statistics given
the two scatter diagrams are for 2 samples of bivariate data. The scales on each axis are identical
(i) for the sample shown in scatter diagram 2 , state an approximate value for the linear (product moment) correlation coefficient r.
is there a way to answer this question? there is no statistics given on the scatter diagram so I think I am supposed to just estimate r based on how the scatter diagram looks like?
(ii) the value of r for the sample for scatter diagram 1 is + 1. Explain why this need not imply that a linear relationship holds for the whole population.
I hope you'll be able to understand what I wrote If there are any uncertainties I Will try my best to clarify.
Thank you very much!!