正態(tài)分布的若干理論及其應(yīng)用畢業(yè)論文-資料下載頁
2025-06-19 02:49本頁面
【正文】 [J].北京:機(jī)槭工業(yè)出版社. [9] [J]. 北京:科學(xué)出版社,[10] [M]. 北京:科學(xué)出版社,Some Theory of Normal Distribution and Its ApplicationsWANG Wenrui 04104141 Mathematics and Applied MathematicsInstructor LI HaizengAbstract:A lot of experiments and theoretical analyses have shown that it is the most mon for random variables in the natural word and engineering technology to conform to normal distribution. For example: machined ponents’ geometric size (diameter, length, width, height), strength, weight ,life。 random measurement error。 persons’ height and weight。 crops’ harvest。 the number of red blood cells of a healthy person。 fiber strength。 the carbon content of per ton liquid ironmaking workshop。 student’s test scores。 machine’s maintenance durations。 a year’s rainfall in a certain area。 The distribution of shell’s falling points, all the above can be seen as obeying or nearing to obey normal distribution. Mathematics and experience have proved that random variables which stand influences from plentiful, independent, even small effects conform to normal distribution. In mathematical static of inferring many statistics, it is nearing normal distribution as long as the sample size is adequate, regardless of information’s original distribution. Even though some statistics deviate from the normal distribution, if the deviation amount is not large, they can also be dealt with according to normal distribution. Therefore, the application of the normal distribution is very broad.Keywords:Normal distribution。 Probability density function。 Standard deviation。 Error
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