The College Copy Shop is in process of purchasing a high-tech copier. In its search, it has gathered the following information about two possible copiers A and B. 
(a) Compute expected rate of return for each copier.
(b) Compute variance and standard deviation of rate of return for each copier.
(c) Which copier should they purchase?
Definitions:
Exercise
Exercise is intentional, organized, and repetitive physical movement aimed at improving fitness and bodily condition.
Colon Surgery
A medical operation performed on the colon, often to remove damaged or diseased sections.
Ostomy
A surgical procedure that creates an opening on the abdominal wall for waste products to exit the body.
Critical Pathway
A care planning tool that outlines the optimal sequencing and timing of interventions by healthcare professionals for a particular diagnosis or procedure, aimed at enhancing the quality and efficiency of care.
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