Henan malpractice Construction Engineering Testing Co., Ltd. is a professional testing company, is one of the qualification place in Henan Province since the first detection through examination of business. Business in the Pile qualification qualification, the qualification grade steel, a qualified indoor environment, building energy efficiency testing, subject testing, materials testing to detect steel, glass curtain wall testing, detection of roads and bridges, air defense projects to detect a number of test qualification and testing Lab. Sample also called sub-samples are randomly selected from the population out, and concluded that part of the overall quality of the individual features according to their findings. The number of individuals called to be drawn sample, the sample is called the sample size Kaifeng Steel detected by n. The quality of statistical inference is done in the production process or batch of products Yuwangtai area steel testing, random samples were obtained quality characteristics of the samples were detected by using statistical methods of probability and mathematical statistics based on overall Quality analysis and inference. Characteristic quality of the data values: Description sample quality data Fluctuation of indicators called sample data eigenvalues. Commonly used to describe the data of central tendency of the eigenvalues ??and describe data from the trend eigenvalues. Statistical inference is based on the characteristic values ??of the sample analyzed to determine the overall quality of health Henan malpractice Construction Engineering Testing Co., Ltd. is a professional testing company, is one of the qualification place in Henan Province since the first detection through examination of business. Business in the Pile qualification qualification, the qualification grade steel, a qualified indoor environment, building energy efficiency testing, subject testing, materials testing, glass curtain wall testing, roads and bridges detection, detection of a number of civil air defense projects testing qualification and testing laboratories. In the course of conducting proficiency testing program, we comply with proficiency testing scheme provider accreditation requirements of the guidelines, in construction engineering features, explore and discuss the construction industry to adapt to proficiency testing programs and organizational management methods, and gradually the proficiency testing program by the usual building materials (products) be extended to the field of construction engineering functions and entities. Qixian steel testing | malpractice detection Supervision Station (certified) | Steel malpractice detected by Henan Construction Engineering Inspection Limited. Henan malpractice Construction Engineering Testing Co., Ltd. (www.hnrsjc.cn) (www.rsgcjc.com) is a leader in Zhengzhou, construction, over the years, the company is implementing the scientific management, innovation and development, the principle of honesty and trustworthiness, the maximum to meet customer needs. In malpractice detected leadership with the staff warmly welcome all inquiries negotiations to create a better future malpractice detected.