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Submitted on: 01 June 2010.
Revised on: 10 September 2010.
Accepted on: 11 October 2010.
___________________Journal of Statistics and Management Systems
Submitted on: 12 June 2016.
Revised on: 01 August 2016.
Accepted on: 21 September 2016.
___________________Journal of Statistics and Management Systems
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Submitted on: 19 August 2021.
Revised on: 17 October 2021.
Accepted on: 19 November 2021.
___________________Journal of Statistics and Management Systems
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