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
In a normal distribution, the amount of the distribution that lies within 1 standard deviation of the mean is 68 percent, rounde
In a normal distribution, the amount of the distribution that lies within 1 standard deviation of the mean is 68 percent, rounde
admin
2020-10-11
21
问题
In a normal distribution, the amount of the distribution that lies within 1 standard deviation of the mean is 68 percent, rounded to the nearest whole percent. A certain set of values is normally distributed with a mean of 81 and a standard deviation of 5. A value x will be randomly selected from the set.
Quantity A: The probability that x will be less than 76 or greater than 86
Quantity B: The probability that x will be between 81 and 86
选项
A、Quantity A is greater.
B、Quantity B is greater.
C、The two quantities are equal.
D、The relationship cannot be determined from the information given.
答案
B
解析
平均值81,标准差为5,小于76或大于86的都在一个标准差以外,由题可知一个标准差以内的占比为68%,故一个标准差以外的占比为32%。根据对称性,81到86之间为0到右边一个标准差,占比为68%的一半即34%,32%<34%,故答案为B。
转载请注明原文地址:https://kaotiyun.com/show/fqkO777K
本试题收录于:
GRE QUANTITATIVE题库GRE分类
0
GRE QUANTITATIVE
GRE
相关试题推荐
Conversationbeginsalmostthemomentwecomeintocontactwithanotherandcontinuesthroughouttheday【B1】______theaidof
Lifeasawomaninthecolonial(殖民的)Americaseemsquitedifferentfromitistoday.Womenwereconsideredinferiortomen,afac
Inmakingmarketinvestigation,oneshould______.WhichofthefollowingstatementsisNOTtrue?
AftersixmonthsoflivinginNewZealand,Irealizedonething.Despitemy【C1】______forgreatercontactwithlocalstudents,un
Weallknowthatitispossibleforordinarypeopletomaketheirhomesontheequator,althoughoftentheymayfeeluncomfortab
5个人并排排成一排,其中甲不能够排在两头,问一共有多少种排法?
Thevalueofywilldecreaseasthevalueofxincreasesinwhichofthefollowingequations?
在下图中,两条水平线是平行的,求x和y的值。
一堆盒子的averageweight是4千克,thestandarddeviation为0.8,其中某一个盒子的重量比averageweight少了1.5个standarddeviation,那么这个盒子的重量是多少?
一副扑克牌(去掉2张王牌),每人随意摸2张牌,至少有多少人才能保证他们当中一定有两个人所摸2张牌的花色情况是相同的?
随机试题
葡萄胎患者严密随诊的原凶是
下列政策措施中,属于增强劳动者就业能力的是()
某跨度40m现浇预应力钢筋混凝土简支梁桥,采用后张法张拉预应力。施工单位采用碗扣式满堂支架施工,如下图所示,支架由钢管、扣件、型钢等组成,纵横梁采用电弧焊连接。支架为就近租赁,为保证支架安装质量,施工单位认真检查了扣件的外观质量。为了保证支架的承载力以及
“完全获得标准”是确定货物原产地的重要标准。根据这一标准,完全在一个国家生产或制造的进口货物包括()。
帝王陵的地面建筑主要由祭祀建筑区、神道和护陵监三部分组成。()
Tomysurprise,atyesterday’smeetingheagain______theplanthathadbeendisapprovedaweekbefore.
在C语言中(以16位PC机为例),一个int型数据在内存中所占的字节数为______;一个float型数据在内存中所占的字节数为______。
[A]Hi,thisisPeter.[B]Thankyou.[C]Howaboutgoingtothecinema?[D]Couldyoubuyaticketforme?[E]I’dliketomeet
MilankovitchproposedintheearlytwentiethcenturythattheiceageswerecausedbyvariationsintheEarth’sorbitaroundthe
We’llbeonlytoogladtoattendyourparty______wecangetababy-sitter.
最新回复
(
0
)