Submitted on: 16 June 2002.
Revised on: 25 September 2002.
Accepted on: 16 October 2002.
___________________Journal of the Korean Statistical Society
Submitted on: 12 October 2022.
Revised on: 15 January 2023.
Accepted on: 06 February 2023.
___________________Journal of the Korean Statistical Society
Submitted on: 25 August 2009.
Revised on: 06 November 2009.
Accepted on: 24 November 2009.
___________________Journal of the Korean Statistical Society
Submitted on: 31 October 2022.
Revised on: 07 February 2023.
Accepted on: 25 February 2023.
___________________Journal of the Korean Statistical Society
Submitted on: 18 February 2003.
Revised on: 09 April 2003.
Accepted on: 03 June 2003.
___________________Journal of the Korean Statistical Society
Submitted on: 27 April 2006.
Revised on: 31 July 2006.
Accepted on: 31 August 2006.
___________________Journal of the Korean Statistical Society