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Simulation study using Normal distribution: Suppose
, and one is interested to estimate the location parameter,
. Now in order to compare the efficiencies of the multistage sampling procedures we consider the bounded risk estimation problem of
, for both (i) SEL and (ii) linear exponential (LINEX) loss functions. The estimate of is , and the bounded SEL and LINEX loss risk problems may be written as and , respectively. The corresponding optimal sample sizes, with a known value of the scale parameter,
, are then and respectively. In case s is unknown, then both the bounded risk problems may be solved using different adaptive sampling procedures.
Simulation study using Exponential distribution: Consider the exponential distribution, , with location parameter,
and scale parameter as
. We highlight the advantages of using sequential sampling procedures when one is interested to estimate, If is the set of sample observations, then the best estimate of is , for both known and unknown values. Now the bounded SEL risk problem may be formulated as , while the counterpart for LINEX loss bounded risk is . The corresponding
optimal sample sizes, are and respectively. So with s being unknown, one may solve both these bounded risk problems using different multi-stage sampling methodologies. |