Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: An improved estimator for population mean using auxiliary information in
  stratified random sampling   In the present study, we propose a new estimator for population mean of the
study variable y in the case of stratified random sampling using the
information based on auxiliary variable x. Expression for the mean squared
error (MSE) of the proposed estimators is derived up to the first order of
approximation. The theoretical conditions have also been verified by a
numerical example. An empirical study is carried out to show the efficiency of
the suggested estimator over sample mean estimator, usual separate ratio,
separate product estimator and other proposed estimators.

34
The categories of this paper are: chem-ph
31
The categories of this paper are: ao-sci
5
The categories of this paper are: gr-qc
33
The categories of this paper are: plasm-ph
28
The categories of this paper are: alg-geom
25
The categories of this paper are: patt-sol
35
The categories of this paper are: mtrl-th
11
The categories of this paper are: hep-lat
3
The categories of this paper are: physics
13
The categories of this paper are: quant-ph
8
The categories of this paper are: hep-ex
1
The categories of this paper are: cs
23
The categories of this paper are: solv-int
6
The categories of this paper are: astro-ph
0
The categories of this paper are: hep-ph
27
The categories of this paper are: comp-gas