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
2012-10-23
22
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 modern descriptive statistics. From the influence of the father came modern 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
转载请注明原文地址:https://kaotiyun.com/show/Xo9O777K
0
考博英语
相关试题推荐
Thefirstmanwhocookedhisfood,insteadofeatingitraw,livedsolongagothatwehavenoideawhohewasorwherehelived
Hismotherfrequentlydenieshimpermissiontodothings,andthatis______.
Theannouncementofthedeathoftheirleadercausedthereafterafeelingofgreatdespairto______theirlives.
OverandoverinWaroftheWorlds,heevokesthesensation,morefamiliarfromdreamsthanmovies,______anotherworldlyentity
Uponreachinganappropriateage(usuallybetween18and21years),childrenareencouraged,butnotforced,to"leavethenest"
Justasthereareoccupationsthatrequirecollegeorevenhigherdegrees,______occupationsforwhichtechnicaltrainingisne
Rockswhichhavesolidifieddirectlyfrommoltenmaterialsarecalledigneousrocks.Igneousrocksarecommonlyreferredtoasp
FamedsingerStevieWondercan’tseehisfansdancingathisconcerts.Hecan’tseethehandsofhisaudienceastheyapplaudwi
Inthatcountry,gueststendtofeeltheyarenothighly______iftheinvitationtoadinnerpartyisextendedonlythreeorfour
Writealetterofinvitationofabout100wordstoyourclosefriendTom,askinghimtocomeandstayforaweek-endwithyourf
随机试题
患者,女,60岁。既往有慢性左心衰竭病史1年,反复胸闷、气促1年,加重2天入院,突发意识模糊,呼之不应。查体:心率124次/分,血压67/45mmHg,血氧饱和度为80%。以下治疗应慎重的是
国有建设用地使用权出让的基本方式主要包括()。
[2007年第108题]晶体管单管放大电路如图7.5.7(a)所示,其中电阻RB可调,当输入ui、输出uo的波形如图7.5—7(b)所示时,输出波形()。
因特殊原因,使得工程个别部位或局部达不到规范和设计要求但不影响使用,且未能及时进行处理的工程质量缺陷问题但质量评定仍为合格的工程,必须以()形式进行记录备案。
背景材料:某机电安装公司承担北方某城市包括安装三台蒸发量25t/h、蒸汽压力为2.5MPa的散装工业锅炉的锅炉房工程。开工前,项目部根据锅炉房安装工程施工组织设计,进行了全面的质量策划,并指令专业工程师编制质量控制程序。在施工过程检查中发现,某焊工的合
反映企业一定会计期间现金和现金等价物流入和流出的财务报表的是()
安倩是一家人力资源咨询公司的培训师。一天她到一家公司去推销自己,可是该公司的经理不愿意做人力资源管理培训方面的工作,因为他认为这没多大价值,并且还增加成本。后来在安倩的一再鼓动下,经理勉强答应,但价钱压的很低,其要求是把公司所有人,不分岗位、工种,全都集合
系统测试的原则包括()。
近代画家中,最擅长画马的是()。
病例:患者,女,40岁,近1个月来自觉疲惫乏力、头晕。诊断为缺铁性贫血。服药期间不宜进食()。
最新回复
(
0
)