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
36
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://jikaoti.com/ti/bnqYFFFM
0
考博英语
相关试题推荐
Thewidelypublicizeddemonstrationdidnotafterall____.
Likemanyofmygeneration,Ihaveaweaknessforheroworship.Atsomepoint,however,wealltoquestionourheroesandourne
Nowadayswiththedevelopmentofeconomy,existingcitiesaregrowingbiggerandnewcitiesareappearing.WhatdoyouthinkisO
Duringthenormaldevelopmentofself,achildisaffectedbycertaininfluentialfactors.(1)Infantsformanattachmentwitht
Duringthenormaldevelopmentofself,achildisaffectedbycertaininfluentialfactors.(1)Infantsformanattachmentwitht
Duringthenormaldevelopmentofself,achildisaffectedbycertaininfluentialfactors.(1)Infantsformanattachmentwitht
Theserviceoperates36librariesthroughoutthecountry,whilesix______librariesspeciallyservethecountryside.
Formostofus,theworkisthecentral,dominatingfactoflife.Wespendmorethanhalfourconscioushoursatwork,preparing
随机试题
目前国内外原子荧光商品仪器中二级去水装置共分()种。
《血站执业许可证》有效期为()年,在有效期满前()个月,血站应当办理再次执业登记
四环素、阿司匹林等药物可增加尿中排出的维生素为()。
背景说明:你是宏远公司行政秘书高叶,下面是行政经理苏明需要你完成的几项工作任务。备忘录至:秘书——高叶自:行政经理——苏明内容:公司准备将今年的公司年会办成
食品配料清单应按配料加人量的递增顺序排列。()
人总是按照自己对周围世界和人生的理解来做事做人,有人热爱自然、热爱社会、热爱生活,具有崇高理想和远大志向,积极进取,乐于奉献;有人自以为看破红尘,完全以自我为中心,对社会对他人冷漠无情,毫无爱心,这表明()
科学精神就是怀疑、批判和不断自我扬弃的精神。科学思维方式的长处也许就在于其具有内在的纠错机制。人类的认识史不仅是不断推进未知到已知的过程,也是不断试错纠错的过程;它不仅需要丰富知识宝库的劳作,而且需要清除库存赝品的智慧和勇气。下列说法概括主旨最准确的是
布朗芬布伦纳是生态发展观的代表,他提出了四种环境系统,其中位于外系统的环境有()。
"MusicAppreciationClass"WhydoestheprofessormentionImpressionism?
IfyoulookcloselyatsomeoftheearlycopiesoftheDeclarationofIndependence,beyondtheflourishedsignatureofJohnHanc
最新回复
(
0
)