Efficient Rotation Pattern in Two-Phase Sampling
نویسندگان
چکیده
منابع مشابه
synthesis of platinum nanostructures in two phase system
چکیده پلاتین، فلزی نجیب، پایدار و گران قیمت با خاصیت کاتالیزوری زیاد است که کاربرد های صنعتی فراوانی دارد. کمپلکس های پلاتین(ii) به عنوان دارو های ضد سرطان شناخته شدند و در شیمی درمانی بیماران سرطانی کاربرد دارند. خاصیت کاتالیزوری و عملکرد گزینشی پلاتین مستقیماً به اندازه و- شکل ماده ی پلاتینی بستگی دارد. بعضی از نانو ذرات فلزی در سطح مشترک مایع- مایع سنتز شده اند، اما نانو ساختار های پلاتین ب...
Efficient Replication Variance Estimation for Two-phase Sampling
Variance estimation for the regression estimator for a two-phase sample is investigated. A replication variance estimator with number of replicates equal to or slightly larger than the size of the second-phase sample is developed. In surveys where the second-phase sample is much smaller than the first-phase sample, the procedure has practical advantages. The method is similar in spirit to one o...
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In sample surveys, we always deal with two types of errors: Sampling error and non-sampling error. One of the most common non-sampling errors is nonresponse. This error happens when some sample units are not observed or viewed but they do not answer some of the questions. The complete prevention of this error is not possible, but it can be significantly reduced. The non-response causes bias and ...
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Non-response or other missingness may be occurred in various forms. In this paper, we consider unit non-response, and hence make attempts for adjustments by appropriate weighting. Our special exercise is concerned a two-phase sampling case so that, first, a large sample survey has been conducted with a rather general questionnaire. In the end of this face-to-face contact the interviewer has ask...
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ژورنال
عنوان ژورنال: Journal of Statistical Theory and Applications
سال: 2017
ISSN: 1538-7887
DOI: 10.2991/jsta.2017.16.2.10