首页
登录
职称英语
In a normal distribution, the amount of the distribution that lies within 1 stan
In a normal distribution, the amount of the distribution that lies within 1 stan
游客
2024-01-12
18
管理
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://tihaiku.com/zcyy/3355108.html
相关试题推荐
WhenamphibiansfirstappearedonEarthmillionsofyearsago,theamountofult
Althoughspinachisrichincalcium,italsocontainslargeamountsofoxalicac
Within20yearsitwillprobablybepossibletoidentifythegeneticsusceptibil
Excludingpurchasesbybusinesses,theaverageamountspentonafactory-newcar
Inarecentstudyontheconnectionbetweenbrainabnormalitiesandviolentbeha
Thelargeamountsofcarbondioxidenowbeingreleasedintotheatmospherebyth
AseveredroughtcanactuallylessenthetotalamountofgovernmentaidthatUni
Asocietycanachieveafairdistributionofresourcesonlyunderconditionsof
A1972agreementbetweenCanadaandtheUnitedStatesreducedtheamountofphos
Thefigureofthejaguar,beingarecurringsymbolwithinOlmecart,isprominen
随机试题
Janehasjust______aletterfromafriendofhersinEngland.A、returnedB、answ
[originaltext]W:Ithinkthatthebesttimetoretirefromworkisaround60.M
水提液置带塞试管中,强力振摇,产生持久泡沫的药材是A.远志 B.紫菀 C.延
患者,女性,13岁,恒牙初期。直面型,双侧磨牙中性关系,覆覆盖正常,左上侧切牙扭
同一人员发生重复性违章,每发生一次加倍扣分。
发展铁路运输代理的意义有( )。 A.促进社会生产的专业化分工 B.
在市场经济条件下,薪酬收入是绝大部分劳动者的主要收入来源,它对于劳动者及家庭的保
(2020年真题)关于战略性人力资源管理中人才管理的说法,正确的是()。A
银行承兑汇票的承兑银行,应当按照票面金额向出票人收取()的手续费。A:千分之一
某小区住宅楼,自然层数为23层,建筑高度为70m,该住宅属于()建筑。A.
最新回复
(
0
)