You are considering a security with the following possible rates of return: 
a.Calculate the expected rate of return.
b.Calculate the standard deviation of the returns.
Definitions:
Productivity Increase
A rise in the output of goods or services relative to the input of resources such as time or labor.
Performance Excellence
The achievement of outstanding performance in operations, customer satisfaction, and financial outcomes.
Peters and Waterman
Authors of "In Search of Excellence," a book that presents eight attributes that excellent companies have in common.
Value Chain
This concept describes the full range of activities that businesses go through to bring a product or service from conception to delivery to the final consumer.
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