英语翻译假设检验是数理统计学中根据一定假设条件由样本推断总体的一种方法.根据问题的需要对所研究的总体作某种假设；选取合适

英语翻译
假设检验是数理统计学中根据一定假设条件由样本推断总体的一种方法.根据问题的需要对所研究的总体作某种假设；选取合适的统计量；由实测的样本,计算出统计量的值,并根据预先给定的显著性水平进行检验,作出拒绝或接受假设的判断.而质量管理是指在质量方面指挥和控制组织的协调的活动,包括制定质量方针和质量目标以及质量策划、质量控制、质量保证和质量改进.随着中国产品市场的不断发展,质量管理的方法变得越来越重要.本文运用假设检验结合统计过程控制图对产品进行检验,从而分析产品质量中存在的问题,为以后产品的改进提供一定的依据.

Hypothesis testing is a method of inferring the population from samples in mathematical statistics on the basis of a given hypothesis.It is to make a hypothesis about the population being studied according to the need of a question; to select an appropriate statistic, to calculate the value of the statistic from the samples being measured, and to test according to the preset significance level, so as to make a judgment of rejecting or accepting the hypothesis. Quality management is to command and control the organized and coordinated activities with regard to quality, including establishing quality policy,quality objectives and quality planning, as well as quality control, quality assurance and quality improvement. Along with the continuous market development of Chinese products, the methods/ways of quality management become more and more important.In this paper,the hypothesis test is used in product testing in combination of statistical process control chart, to analyze the quality problems existing in products, so as to provide a basis for future improvement of products.
再问： 请问population一词是否应该改为collectivity更好？
再答： 你好！我之所以选择population而不是collectivity，是由于查询sample的定义时，感觉与之对应的词是population。sample定义如下：items selected at random from a population and used to test hypotheses about the population。 用collectivity也可以，主要看专业或习惯。