The following data represent the number of unique visitors and the revenue a website generated for the months of July through December. 
(See the Excel Data File.)
A) What is the sample standard deviation for the number of unique visitors and the revenue?
B) Calculate the coefficient of variations. Which variable has a higher relative dispersion?
C) Calculate the sample correlation coefficient between the number of unique visitors and Revenue.
D) Comment on the strength of the linear relationship. What does this mean for the owner of the website?
Definitions:
Elderly Patients
Older adults, usually those aged 65 and above, who may require medical treatment and care.
Nervous System
The network of nerve cells and fibers that transmits nerve signals between parts of the body, coordinating actions and sensory information.
Aging
The process of becoming older, characterized by gradual changes in physical, cognitive, and social capabilities over time.
Acetylcholine
A neurotransmitter released by the parasympathetic nerves onto organs and glands for resting and digesting.
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