Alternative classification rules for two normal populations with a common mean and ordered variances

Author(s):  
Pushkal Kumar ◽  
Manas Ranjan Tripathy ◽  
Somesh Kumar
1998 ◽  
Vol 48 (1-2) ◽  
pp. 73-82
Author(s):  
Moloy De ◽  
Jyotirmoy Sarkar

We exhibit the superiority of the Graybill- Deal estimator for estimating the common mean of two univariate normal populations with unequal variances, under a two stage sampling scheme. Some properties of the two-stage Graybill-Deal estimator are discussed.


1995 ◽  
Vol 45 (1-2) ◽  
pp. 103-110
Author(s):  
Moloy De

The purpose of this article is to extend a result of Sinha and Mouqadem ( Commun. Stal. Theo. Meth. 11, 1982, 1603-1614), and present a class of admissible estimators of the common mean of two univariate normal populations with unknown unequal variances. An extension of tbis result in the case of two-stage procedures is also briefly discussed.


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