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
考研
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
2013-06-10
51
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 inferentical 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.
Which of the following is true of descriptive statistics?
选项
A、It leads to increased variability
B、It solves all numerical problems
C、It simplifies unwieldy masses of data
D、It changes qualitative variables to quantitative variables
答案
C
解析
文章第三段最后一句话“Descriptive statistics is tool for describing or summarizing or reducing to comprehensible form the properties of an otherwise unwieldy mass of data.”说明描述统计学是对大量杂乱的数据性质进行描叙、总结或者简化以更易于理解的工具。所以C正确。
转载请注明原文地址:https://kaotiyun.com/show/Wud4777K
0
考研英语一
相关试题推荐
YouaregoingtoreadatextaboutstudyingintheUnitedStates,followedbyalistofexamples.Choosethebestexamplefromt
TheoverallattitudeofthewritertowardstheFrenchsoccerteamis______.ThememorableeveningincludeallthefollowingEX
Inthefollowingtext,somesentenceshavebeenremoved.ForQuestions41-45,choosethemostsuitableonefromthelist(A、B、C、
Whichofthefollowingquestionsdoesthepassagesupplyinformationforanswering?Thepassagesuggeststhatalargedecrease
Thetermauthorityreferstotherightsinherentinamanagerialpositiontogiveordersandexpecttheorderstobefollowed.A
Accordingtothenewschoolofscientists,technologyisanoverlookedforceinexpandingthehorizonsofscientificknowledge.
Justhowdoesapersonarriveatanideaofthekindofpersonthatheis?Hedevelopsthis(1)_____ofselfthroughagraduala
WiththerapidgrowthofChina’seconomyinrecentyears,China’sforeigntradehasbegunanumberofnewpragmaticandflexible
ThefederalentitycreatedbytheConstitutionisbyfarthedominantfeatureoftheAmericangovernmentalsystem.(1)_____the
Youaregoingtoreadalistofheadingsandatextaboutthedevelopmentofmaritimelaws.Choosethemostsuitableheadingfro
随机试题
患者,男,21岁。反复干咳、胸闷3年,可自行缓解,每逢雾霾天气时、打扫卫生、郊外活动时病情复发。2小时前症状再发。查体:双肺散在哮鸣音,心率87次/分。该患者最可能的诊断是
请判断以下哪种闭经是继发性闭经( )。
根据五行相克规律确定的治疗方法是
关于城市空间布局的表述中,错误的有()
生产经营单位的主要负责人因未履行安全生产管理职责,导致发生生产安全事故,被判处有期徒刑的,根据我国《安全生产法》的规定,自刑罚执行完毕之日起( )。
根据共命运条款的规定,分出保险人( )行为的后果不是由合同双方当事人共同承担。
期货公司的负债是指期货公司的对外负债,并包含客户权益。()
()能够促进脂溶性维生素的吸收。
Duringthetraditionalweddingceremony,thebridalcouplepromiseseachotherlifelong【M1】______
TomJohnsoncametoa(11).Hewantedtostayinasingleroomwithbath.Hemadethereservationatthe(12)Afterhearrived
最新回复
(
0
)