考研英语作文预测统计【一】
Everyone may encounter a scene when he or she wonders what the meaning and purpose of life is. Answers to this question vary from person to person. As for me, I agree with the view that the meaning of life is to discover your gift and the purpose of life is to make the best of it.
On one hand, one's gift could be the source of his inner happiness, providing spiritual impetus and correct orientation. Take the world-renowned Chinese pianist Lang Lang as an example. His gift was noticed before he was 3 years old, which laid the foundation of his glorious life. On the other hand, proper use of talent helps people to realize their value in a positive way, thus making contribution to the society as a whole. For instance, Isaac Newton made a universally amazing discovery by digging into his gift and finding the Newton's law of gravitation.
In conclusion, let's search for our true gift and utilize it to the fullest to achieve a happy and valuable life.
考研英语作文预测统计【二】
Dear Sir or Madam,
I am a student of our university, who often spend my spare time in our library. Generally speaking, our library provides quite good service. However, I still have some suggestions for you to upgrade the quality of your service.
To begin with, I would like you to prolong the open time. In the daytime, most students are having classes. To continue, some books are too old/ are out of date. It would be better if you could replace them with updated materials.
I sincerely hope to have a comfortable library. And I would be highly grateful if you could take my suggestions into consideration.
Yours sincerely,
Li Ming
考研英语作文预测统计【三】
经过了为期两天的统计学实验，主要通过EXCEL这个软件来完成这次的实验。
首先掌握用EXCEL进行数据的搜集整理和显示，要求熟练运用EXCEL搜集数据，统计分组，制作统计图。这是最基础的操作，让我们首先对EXCEL有一个初步的了解和认识。
实验二是用EXCEL计算描述统计量，可以运用函数描述统计量。要求我们掌握基础的常用的函数对数据进行初步归纳，了解统计学中最常用的函数组成。实验三用EXCEL进行时间序列分析。首先是测定增长量和平均增长量，然后计算出长期趋势。得出我们所要统计的结果的一个预计变动趋势。让调研人员有一个机动的应变对策。这个实验特别主义对时间序列的把握，常常会搞错要除去的年数。这在实验中常常出错。
实验四用EXCEL进行指数分析，指数分析是统计学中最主要的一个数据分析。先计算出总指数，再得出平均指数，最后进行因素分析。其中平均数是通过加权算数平均法得来的。
实验五是用EXCEL进行相关与回归分析。用EXCEL进行相关分析有两种方法，一是利用相关系数函数，在EXCEL中，提供了两个计算两个变量之间相关系数的方法，CORREL函数和PERSON函数，这两个函数是等价的，实验中我运用了用CORREL函数计算相关系数来进行对数据的分析。另一种是利用相关分析宏。EXCEL进行回归分析同样分函数和回归分析宏两种形式，其提供了9个函数用于建立回归模型和预测。这9个函数分别是：INTERCEPT返回线性回归模型的截距、SLOPE返回线性回归模型的斜率、RSQ返回线性回归模型的判定系数、FORECAST返回一元线性回归模型的预测值、STEYX计算估计的标准误、TREND计算线性回归线的趋势值、GROWTH返回指数曲线的趋势值、LINEST返回线性回归模型的参数、LOGEST返回指数曲线模型的参数。在实验过程中我使用的是回归分析宏进行回归分析。
实验六是用EXCEL进行预测。主要有移动平均法、指数平滑法、趋势预测法。在实验过程中分别对这三种方法进行了尝试。都得到了预期的结果。实验七是用EXCEL进行参数估计和假设检验。主要掌握了解Z检验的操作步骤。
通过这次实验让我对统计学的知识框架有了更深一步的了解，并知道通几种常见的基础的方法，对搜集的资料进行数据归纳，抽样分析，并进行预测，对比这个统计学的过程有了进一步的掌握。在今后的学习生活中，希望可以通过这次学习到的方法和知识，可以对自己所研究的领域，进行进一步的调研，分析，使数据更趋于有用化，可操作化，尽量减少数据的赘余与资源的浪费。学习了统计学就要将之灵活运用于实际的生活中去，让知识造福于人类，让知识拥有自己的生命了。
