The College Copy Shop is in the 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:
Poverty Rate
The Poverty Rate is the percentage of the population that lives below the poverty line, indicating the level of poverty within a country or region.
College Graduates
Individuals who have completed a degree program at a college or university, obtaining qualifications such as a bachelor's, master's, or doctoral degree.
Grade School Dropouts
Individuals who do not complete their primary education, often facing significant barriers to employment and higher education opportunities.
Connections
Relationships or links between people, organizations, or systems that facilitate communication, cooperation, or the exchange of information.
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