A sample of charge accounts at a local drug store revealed the following frequency distribution of unpaid balances. 
A)Determine the mean unpaid balance.
B)Determine the standard deviation.
C)Compute the coefficient of variation.
Definitions:
Embryo Implants
The process by which a fertilized embryo attaches itself to the wall of the uterus, beginning the stages of pregnancy.
Endometrium
The inner lining of the uterus, which thickens during the menstrual cycle in preparation for possible implantation of an embryo.
PDE-5 Enzyme
An enzyme that breaks down cyclic GMP, regulating blood flow in the penis and thus playing a crucial role in erectile function.
Seminal Fluid
The fluid part of semen, produced by various male reproductive glands, providing a medium for sperm transport and nutrients for sperm vitality.
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