Because waterfowl are an important economic resource, wildlife scientists study how waterfowl abundance is related to various environmental variables. In such a study, the variables shown in Table 1.15 were observed for a sample of 52 ponds.
WATER: the amount of open water in the pond, in acres.
VEG: the amount of aquatic and wetland vegetation present at and around the pond, in acres.
FOWL: the number of waterfowl recorded at the pond during a (random) oneday visit to the pond in January.
The results of some intermediate computations:
(a) Make a complete summary of one of these variables. (Compute mean, median, and variance, and construct a bar chart or stem and leaf and box plots.) Comment on the nature of the distribution.
(b) Construct a frequency distribution for FOWL, and use the frequency distribution formulas to compute the mean and variance.
(c) Make a scatterplot relating WATER or VEG to FOWL.