考研背诵50篇——43.Statistics

 　　There were two widely divergent influences on the early development of statistical¹ methods. Statistics had a mother who was dedicated² to keeping orderly records of government units (states and statistics come from the same Latin root status) and a gentlemanly gambling³ father who relied on mathematics to increase his skill at playing the odds⁴ in games of chance. The influence of the mother on the offspring, statistics, is represented by counting, measuring, describing, tabulating⁵, ordering, and the taking of censuses-all of which led to modern descriptive statistics. From the influence of the father came modern inferential statistics, which is based squarely on theories of probability.

 

　　Describing collections involves tabulating, depicting⁶ and describing collections of data. These data may be quantitative⁷ such as measures of height, intelligence or grade level------variables that are characterized by an underlying⁸ continuum---or the data may represent qualitative⁹ variables, such as sex, college major or personality type. Large masses of data must generally undergo a process of summarization or reduction before they are comprehensible. Descriptive statistics is a tool for describing or summarizing or reducing to comprehensible form the properties of an otherwise unwieldy mass of data.

 

　　Inferential statistics is a formalized body of methods for solving another class of problems that present great of problems characteristically involves attempts to make predictions using a sample of observations. For example, a school superintendent¹⁰ wishes to determine the proportion of children in a large school system who come to school without breakfast, have been vaccinated¹¹ for flu, or whatever. Having a little knowledge of statistics, the superintendent would know that it is unnecessary and inefficient¹² to question each child: the proportion for the sample of as few as 100 children. Thus , the purpose of inferential statistics is to predict or estimate characteristics of a population from a knowledge of the characteristics of only a sample of the population.

1 statistical   

adj.统计的，统计学的

参考例句：

• He showed the price fluctuations in a statistical table.他用统计表显示价格的波动。
• They're making detailed statistical analysis.他们正在做具体的统计分析。

2 dedicated   

adj.一心一意的；献身的；热诚的

参考例句：

• He dedicated his life to the cause of education.他献身于教育事业。
• His whole energies are dedicated to improve the design.他的全部精力都放在改进这项设计上了。

3 gambling   

n.赌博；投机

参考例句：

• They have won a lot of money through gambling.他们赌博赢了很多钱。
• The men have been gambling away all night.那些人赌了整整一夜。

4 odds   

n.让步，机率，可能性，比率；胜败优劣之别

参考例句：

• The odds are 5 to 1 that she will win.她获胜的机会是五比一。
• Do you know the odds of winning the lottery once?你知道赢得一次彩票的几率多大吗？

5 tabulating   

把（数字、事实）列成表( tabulate的现在分词 )； 制表

参考例句：

• The Census Office did not finish tabulating the results until 1888. 直到1888年，人口普查办公室才完成统计数字表格。
• By 1890 a revolutionary electrical tabulating system was available. 到了1890年，一种具有革命意义的电动制表装置投入使用。

6 depicting   

描绘，描画( depict的现在分词 )； 描述

参考例句：

• a painting depicting the Virgin and Child 一幅描绘童贞马利亚和圣子耶稣的画
• The movie depicting the battles and bloodshed is bound to strike home. 这部描写战斗和流血牺牲的影片一定会取得预期效果。

7 quantitative   

adj.数量的，定量的

参考例句：

• He said it was only a quantitative difference.他说这仅仅是数量上的差别。
• We need to do some quantitative analysis of the drugs.我们对药物要进行定量分析。

8 underlying   

adj.在下面的，含蓄的，潜在的

参考例句：

• The underlying theme of the novel is very serious.小说隐含的主题是十分严肃的。
• This word has its underlying meaning.这个单词有它潜在的含义。

9 qualitative   

adj.性质上的，质的，定性的

参考例句：

• There are qualitative differences in the way children and adults think.孩子和成年人的思维方式有质的不同。
• Arms races have a quantitative and a qualitative aspects.军备竞赛具有数量和质量两个方面。

10 superintendent   

n.监督人，主管，总监；(英国)警务长

参考例句：

• He was soon promoted to the post of superintendent of Foreign Trade.他很快就被擢升为对外贸易总监。
• He decided to call the superintendent of the building.他决定给楼房管理员打电话。

11 vaccinated   

[医]已接种的，种痘的，接种过疫菌的

参考例句：

• I was vaccinated against tetanus. 我接种了破伤风疫苗。
• Were you vaccinated against smallpox as a child? 你小时候打过天花疫苗吗？

12 inefficient   

adj.效率低的，无效的

参考例句：

• The inefficient operation cost the firm a lot of money.低效率的运作使该公司损失了许多钱。
• Their communication systems are inefficient in the extreme.他们的通讯系统效率非常差。