中职数学中一元线性回归模型的教学改进

一元线性回归模型是中职数学教学中的重要内容,在一元线性回归模型中,最重要的就是回归系数的取值。但在以往的教学中,关于一元回归系数的确定只是通过公式计算,没有推导过程,学生并不明白其中的含义。文章通过引入实例,采用数形结合的方法帮助学生理解一元线性回归模型的基本理论和适用方法,并利用相关软件估计回归参数,同时进行显著性检验,并通过模型进行预测,进一步检验模型的可行性,以此为一元线性回归模型的教学改进提供一定的参考。     

线性回归分析和检验在经济中的应用

针对于回归分析中的一元线性回归模型,多元线性回归模型的方法和原理进行系统的阐述和说明,利用统计软件并结合实例提供一种快捷而有效的解决线性回归模型中参数值,同时对回归模型进行检验,包括R检验,F检验和T检验.     

回归分析在人口预测中的应用

本试用数理统计中回归分析的方法,建立我国人口,总数与时间的一元线性回归模型,用于人口预测。     

一元线性回归方法的理论及其应用

一元线性回归主要研究两个变量之间的线性相关关系,本文主要论述了一元线性回归分析的基本理论,借助统计软件SPSS对一个简单的实例进行了分析,包括对实例的相关性分析、建模、对模型的显著性检验以及残差的分析,通过实例更进一步了解一元线性回归在具体问题中的应用.     

一元线性回归分析在保险行业的应用

运用一元线性回归分析的方法及其基础理论,借助SPSS统计软件建立了保险公司损失数额的线性回归模型及预测,最后对线性回归在保险行业中的应用做了相关总结.     

指数函数模型线性化后的误差问题

基于一元线性回归,对指数函数模型线性化后的随机误差存在的问题进行分析。引入对数正态分布,比较线性化前后误差的期望。     

多元模糊线性回归模型的参数估计

该文考虑了多元模糊线性回归模型,先将一元模糊线性回归模型的参数估计的结果加以推广,接着给出了多元线性回归模型参数的h-最优线性相关估计。     

中国入境旅游发展预测与开发对策研究

入境旅游的入境人数和外汇收入是衡量一个国家或地区旅游经济实力和开放程度的指标,也是研究一个国家或地区入境旅游发展态势的重要指数．利用1978年-2004年的中国入境旅游统计资料来分析我国入境旅游市场的现状特点,运用数理统计模型,包括一元线性回归、多元线性回归、指数曲线和对数曲线四种回归方程来预测未来我国入境旅游的发展趋势,运用波士顿矩阵进行市场竞争态分析,提出未来我国入境旅游的开发战略和对策．     

跨国公司税收筹划的数学建模分析

采用定性与定量分析相结合的方法,对A公司的税收筹划进行分析,通过建立一元线性回归模型,对这一方法的可行性进行分析,得出可以利用虚拟货币进行税收筹划、但需要对风险加以控制的相关结论.同时,从企业和政府两个角度看待这一新的发展方向,并分别向企业和税务机关提出了相关的建议.     

广播电视大学开放教育学费回归分析

通过搜集全国广播电视大学的学费标准,获得样本,利用一元线性回归统计模型,对人均GDP与学费之间的关系进行研究。给出x0,即可求出y0及其对应的置信区间。     

Western and Eastern culture differences in commercial field

The communication of people partially is the communication of cultures. Culture has a direct effect on international commercial activities in all aspects. Different conceptions about time, space, equality, law and the like, lead people to deal with things in different ways. So to know cultures of the counterpart is to facil-itate our enterprises so as to have a smooth and successful communication in commercial activity.     

风的曲线

Rosco and I wait for the fishermen to return.I sit at a wooden bench near the store at Mt.Baker Resort and watch the clouds change shape. Rosco has my belt around his neck and an eight foot tow chain hooked to a tree. Dogs must be on a leash. Ducks and rabbits are loose.     

团图为数的图中的闭团贯数

Given a graph G,a subgraph C is called a clique of G if C is a complete subgraph of G maximal under inclusion and |C|≥2. A clique-transversal set S of G is a set of vertices of G such that S meets all cliques of G. The clique-transversal number, denoted as TC (G), is the minimum cardinality of a clique-transversal set in G. The clique-graph of G, denoted as K (G), is the graph obtained by taking the cliques of G as vertices, and two vertices are adjacent if and only if the corresponding cliques in G have nonempty intersection. Let F be a class of graphs G such that F={G|K(G) is a tree}. In this paper the graphs in F having independent clique-transversal sets are shown and thus TC (G)/|G|≤1/2 for all G ∈ F.     

卡思卡特城堡

It is worthy of noting that, whilst Crookston Castle witnessed the earlier and happier portion of Mary's variegated life,     

不同的吃喝玩乐

一、吃和喝吃苹果 eat an apple, 吃药 take medicine,吃糖 have some sweets,吃饭 have one's meals,吃馆子 dine out,吃惊 be surprised/     

漏洞百出的教育

Many college freshmen arrive woefully unprepared to do college work, and as disadvantaged populations continue to grow, the share of the American work force that has made it through college is expected to plummet. Many experts blame that educational failure not just on high schools but also on colleges. School & College, a special report by The Chronicle, looks at efforts to fix the system. What reforms would better prepare students for college? What should schools and colleges be doing differently? How should state and federal officials help?     

Social and Cultural Influence on Word Meaning

Different nations have different social cultures, and the social culture of every nation is developing with the development of the nation, language is greatly influenced by social culture, which enables language to possess national and historical characteristics. Word is the smallest, independent, meaningful linguistic unit of language. It can well reflect the national and historical characteristics. From synchronic aspect, the social and cultural influence on word meaning is mainly embodied in conceptual and associative meanings of word. The incorrespondence of word meaning is a phenomenon that exists in both conceptual and associative meanings of word among different languages. From diachronic aspect, the development of social culture causes some changes of word meaning to some extent. Therefore, social culture plays a key role in vocabulary learning and mastery of a language.     

汉字倒说

汉字的六书,《说文》对“转注”一类,语焉不详。后世学者提及转注,也仅限于许慎所举出的例字。《汉字例说》一文,作者从转注的角度综合考虑,对部分现代常用字作了分析,跟传统的解释有所不同。希望能抛砖引玉,互相切磋,以推进学术研究。     

只要努力,不要后悔

There are numbers of crossroads on our long and unpredictable life journey where we totally have no idea about which direction to choose. No matter what our decision is, we should not turn back, but face the music and go ahead instead. I am this kind of girl who always does try without regretting, one example is how I dealt with my love.