MULTISTAGE POINT ESTIMATION OF THE COMMON LOCATION PARAMETER OF SEVERAL EXPONENTIAL-DISTRIBUTIONS

The problem of point estimation of the common location parameter of se veral exponential distributions is considered. The scale parameters ar e assumed to be unknown and unequal. Consideration is given to a famil y of loss functions. Non-existence of the fixed sample size procedure is established to deal with the present estimation problem. Purely seq uential, accelerated sequential, three-stage and two-stage procedures are developed to handle the situation. Relative advantage and disadvan tage of these estimation approaches are established.