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
Closing prices for a certain stock were recorded each day for a week in the table above. If the monthly average (arithmetic mean
Closing prices for a certain stock were recorded each day for a week in the table above. If the monthly average (arithmetic mean
admin
2011-01-18
101
问题
Closing prices for a certain stock were recorded each day for a week in the table above. If the monthly average (arithmetic mean) was 18.43 and the standard deviation was 0.27, how many days during this week did the closing price fall within two standard deviations from the average?
选项
A、1
B、2
C、3
D、4
E、5
答案
C
解析
Since two standard deviations away from the mean works out to 18.43-0.27×2=17.89, there are 3 days during which the stock prices fell between 17.89 and 18.43: Monday, Tuesday, and Wednesday. We really don’t have to worry about prices above the mean, because there were none of them during this time frame.
转载请注明原文地址:https://www.kaotiyun.com/show/9JtO777K
本试题收录于:
GMAT QUANTITATIVE题库GMAT分类
0
GMAT QUANTITATIVE
GMAT
相关试题推荐
Susan:Wow,Iloverelaxingafteralongdayofwork.Bob:Metoo!【D8】______Susan:Iliketopracticeyoga.Bob:Youdoyoga?T
Whatyou’realwaysheard?We’reeatingwaytoomuchsalt.TheaverageAmericangetsabout3.4gramsofsodiumeveryday,farm
Itisdifficulttoimaginewhatlifewouldbelikewithoutmemory.Themeaningsofthousandsofeverydayperceptions,thebases
Everydirectorneedsanassistantthathecan______totakecareofproblemsthatmayoccurinhisabsence.
—Sir,______?—Yes,sir.Youranthroughthestopsign.MayIseeyourdriverlicense,please?
W:Howannoying!Ican’tfigureoutasolutiontothisproblem.Canyouhelpme?M:______
Inmakingmarketinvestigation,oneshould______.Allthefollowingarechannelstogetmarketinformationexcept______.
Therearemanyolderpeopleintheworldandtherewillbemanymore.Alittle-knownfactisthatover60percentoftheolderp
Alltheusefulenergyatthesurfaceoftheearthcomesfromtheactivityofthesun.Thesunheatsandfeedscreaturesandmank
随机试题
如果函数在(-∞,+∞)内连续,则a=().
下列情况不属于高危计划生育手术的是
患者,男,70岁。右胁肋处出现成簇水疱,排列成带状,皮肤刺痛,舌红苔黄,脉弦数。内治应首选
某药品生产企业的销售员张某携带生产企业出具的在B县销售的授权委托书,一路以流动的形式销售药品,在A县将药品销售给药品经营公司,该经营公司购进药品时也未查验张某的委托授权书等证件。根据《医疗用毒性药品管理办法》,关于医疗机构使用医疗用毒性药品,说法错误的
地下工程防水效果检查记录内容包括检查方法、检查内容及检查结果。()
阅读下面一段文字,完成题目。高新技术带来的负效应高新技术的发展,应包括健全其抗御“灾害”的功能。但迄今为止,高新技术进步并未与高可靠性工艺、高可靠性监控、高可靠性管理的系统支撑及质保体系相匹配。因此,频频出现难以预料的尴尬局面。海湾战争
对于灰度图像来说,颜色深度决定了该图像可以使用的亮度级别数目。
Informationistheprimarycommodityinmoreandmoreindustriestoday.By2005,83%ofAmericanmanagementpersonnelwillb
Chinahasoutlinedanewapproachtoforeigninvestment,withplannerssayingtheywillnowfocuslessonattractinglargeamoun
WhenLouiseBrownwasbornon25July1978,shekickedoffanera.Thefirst"testtubebaby"isamotherherselfnow,andshe’s
最新回复
(
0
)