Question: It is believed that forest canopy closure (X, in percent) is an important factor in determining the suitability of a forest for use by flying squirrels. Suppose that the density of flying squirrels is Y , in numbers per hectare.
(a) Describe a design situation in which you deliberately alter forest plots to have specified discrete levels of canopy closure and then observe what the resulting flying squirrel density becomes.
(b) Describe a study in which you randomly sample forest plots and measure their naturally occurring values (X . Y ).