文章基本信息

标题：The Relationship Between Language Learning Strategies and Vocabulary Size Among High School ELL Students
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作者：Reem Rabadi
期刊名称：International Journal of English Linguistics
印刷版ISSN：1923-869X
电子版ISSN：1923-8703
出版年度：2019
卷号：9
期号：1
页码：120-134
DOI：10.5539/ijel.v9n1p120
出版社：Canadian Center of Science and Education
摘要：Based on progressive type-II censored sample with random removals, point and interval estimations for the shape parameters of the exponentiated Weibull distribution are discussed. Computational formula for the expected total test time are derived for different situations of sampling plans. This is useful in planning a life test experiment. The efficiency of the estimators are compared in terms of the root mean square error, the variance and the coverage probability of the corresponding confidence intervals. A simulation study is presented for several values of removal probability and different values of failure percentage. Also, numerical applications are conducted to illustrate and compare the usefulness of the different sampling plans in terms of expected test times for different patterns of failure rates.
关键词：language learning strategies; metacognitive strategies; cognitive strategies; social-affective strategies; vocabulary size