Suppose I have 10 subjects of different ages. I want to know if there is a correlation between age and a specific parameter. That parameter for example is the area of pituitary cells. So in essence I want to know if there is a correlation between age and the area of pituitary cells.

If I take a sample of 10 cells from each subject and average it, it gives me the average size of a pituitary cell for that subject.

Can I then use PCC to calculate the correlation between age and the average size of the pituitary cells?

Thanks.