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REFERENCES
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Black, Ken (2001).
Business statistics : Contemporary Decision Making, 3rd ed., South-Western
College Publishing
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Howell, David. Fundamental
Statistics for the Behavioral Sciences 6th edition, p. 358
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Oxford Dictionary
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- Rubin, Harvey (2007).
Dictionary of Insurance Terms, 4th ed., Barron’s Educational
Series Inc.
- Sullivan, Michael
(2008). Statistics : Informed Decisions Using Data, 3rd ed., Prentice
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- Wikipedia : the Free
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http://en.wikipedia.org/wiki/
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