首页
外语
计算机
考研
公务员
职业资格
财经
工程
司法
医学
专升本
自考
实用职业技能
登录
外语
There were two widely divergent influences on the early development of statistical methods. Statistics had a mother who was dedi
There were two widely divergent influences on the early development of statistical methods. Statistics had a mother who was dedi
admin
2013-01-25
31
问题
There were two widely divergent influences on the early development of statistical methods. Statistics had a mother who was dedicated to keeping orderly records of governmental units ( state and statistics come from the same Latin root, status) and a gentlemanly gambling father who relied on mathematics to increase his skill at playing the odds in games of chance. The influence of the mother on the offspring, statistics, is represented by counting, measuring, describing, tabulating, ordering, and the taking of censuses——all of which led to modem descriptive statistics. From the influence of the father came modem inferential statistics, which is based squarely on theories of probability.
Descriptive statistics involves tabulating, depicting, and describing collections of data. These data may be either quantitative, such as measures of height, intelligence, or grade level——variables that are characterized by an underlying continuum or the data may represent qualitative variable, 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 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 difficulties for the unaided human mind. This general class of problems characteristically involves attempts to make predictions using a sample of observations. For example, a school superintendent wishes to determine the proportion of children in a large school system who come to school without breakfast, have been vaccinated for flu, or whatever. Having a little knowledge of statistics, the superintendent would know that it is unnecessary and inefficient to question each child; the proportion for the entire district could be estimated fairly accurately from a sample of as few as 100 children. Thus, the purpose of inferential statistics is to predict or estimate characteristics of a population from knowledge of the characteristics of only a sample of the population.
Why does the author mention the "mother" and "father" in the first paragraph?
选项
A、To present the background of statistics in a humorous and understandable way
B、To point out that parents can teach their children statistics
C、To explain that there are different kinds of variables
D、To introduce inferential statistics
答案
A
解析
作者用“父亲”、“母亲”这样的说法只是为了用一种幽默和易懂的方式来介绍统计学的由来。
转载请注明原文地址:https://kaotiyun.com/show/nJ1O777K
0
考博英语
相关试题推荐
Apparentlyfirstdescribedin1964,transientglobalamnesiaconsistsofa(n)abruptlossofmemorylastingfromafewsecondsto
OneofFreud’sgreat_____intothehumanpersonalitywasthediscoveryofhowitisinfluencedbyunconsciousprocesses.
Thewidelypublicizeddemonstrationdidnotafterall____.
Nowadayswiththedevelopmentofeconomy,existingcitiesaregrowingbiggerandnewcitiesareappearing.WhatdoyouthinkisO
Duringthenormaldevelopmentofself,achildisaffectedbycertaininfluentialfactors.(1)Infantsformanattachmentwitht
Duringthenormaldevelopmentofself,achildisaffectedbycertaininfluentialfactors.(1)Infantsformanattachmentwitht
Formostofus,theworkisthecentral,dominatingfactoflife.Wespendmorethanhalfourconscioushoursatwork,preparing
Formostofus,theworkisthecentral,dominatingfactoflife.Wespendmorethanhalfourconscioushoursatwork,preparing
随机试题
妊娠期贫血,下列哪种最常见()
某公司2013年度的税后利润为1000万元,该年分配股利500万元,2015年拟投资1000万元引进一条生产线以扩大生产能力,该公司目标资本结构为自有资金占80%,借入资金占20%。该公司2014年度的税后利润为1200万元。要求:如果该公司执
我们说HLB值具有加和性,指的是
心室颤动电除颤应首选直流电
为使客户成为真正的买方或租客,房地产经纪人应()。[2010年考试真题]
【背景资料】某公司承接了某城市道路的改扩建工程。工程中包含一段长240m的新增路线(含下水道200m)和一段长220m的路面改造(含下水道200m)。另需拆除一座旧人行天桥,新建一座立交桥,立交桥上部结构为预应力箱梁。进度计划如下图所示:
商业银行应选派精通现代金融理论及金融创新理论的高素质客户经理接洽业务的细分市场为()。
西方人的理财意识与行业发展成熟度的关系表现在()。
甲、乙、丙、丁四人出资设立A有限合伙企业,其中甲、乙为普通合伙人,丙、丁为有限合伙人。合伙企业存续期间,发生以下事项:(1)6月,合伙人丙同A合伙企业进行了120万元的交易,合伙人甲认为,由于合伙协议对此没有约定,因此,有限合伙人丙不得同本合伙企业进行交
2013年伊始,北京就遭遇了持续多日的灰霾天气,空气污染引发的“北京咳”成为人们热议的话题之一。为了破解灰霾困境,有专家建议:从公交车、出租车和市政公用车辆开始,用电动车代替燃油车,以后再逐步推广到其他社会车辆。如果以下陈述为真,哪一项最有力地质疑了上述专
最新回复
(
0
)