Compute the correlation and sample covariance.
A data set contains the height (Y1) and the volume (Y2) of 3 black berry trees, and the observations are (75; 18.2); (80; 22.6); (75; 19.9):
1. Intuitively, what kind of correlation between Y1 and Y2 do you expect? Positive, negative or zero?
2. Compute the sample covariance and the sample correlation.