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
BIn this problem you are asked to compare the average with the median of the 120 numbers in list Z. Since list Z consists of the
BIn this problem you are asked to compare the average with the median of the 120 numbers in list Z. Since list Z consists of the
admin
2014-08-12
62
问题
选项
答案
B
解析
In this problem you are asked to compare the average with the median of the 120 numbers in list Z. Since list Z consists of the numbers in lists X and Y combined, it is reasonable to try to use the information about lists X and Y to calculate the average and the median of the numbers in list Z.
To determine the average of the 120 numbers in list Z, you can use the information given about the individual averages of the numbers in lists X and Y. Because lists X and Y each contain 60 numbers, the average of the numbers in list Z is the average of the individual averages of the numbers in lists X and Y. Thus, the average of the numbers in list Z is
, or 4.9.
To determine the median of the 120 numbers in list Z, first note that list Z contains an even number of numbers, so the median of the numbers in list Z is the average of the middle two numbers when the numbers are listed in increasing order. If you look at the numbers in the two lists, you will see that the 60 numbers in list X are all less than or equal to 5, and the 60 numbers in list Y are all greater than or equal to 6. Thus, the two middle numbers in list Z are 5 and 6, and the average of these numbers is
, or 5.5. Therefore, the median of the numbers in list Z is 5.5, and this is greater than the average of 4.9. The correct answer is Choice B.
转载请注明原文地址:https://kaotiyun.com/show/gykO777K
本试题收录于:
GRE QUANTITATIVE题库GRE分类
0
GRE QUANTITATIVE
GRE
相关试题推荐
Itisanunfortunatefactoftoday’slifethatmostpeoplearegrowingupunabletoseethestars.Theprimenightskyexistson
Somepeoplethinkoflifeasagame.Therearesimilaritiesbetweenlifeandgames;bothcanbeplayed,bothhaverules,andbot
Conversationbeginsalmostthemomentwecomeintocontactwithanotherandcontinuesthroughouttheday【B1】______theaidof
AsTheplanecircledovertheairport,everyonesensedthatsomethingwaswrong.Theplanewasmovingunsteadilythroughtheair
Allthefollowingcasesareon-the-jobsmokingexceptthat______.Passivesmokingmeans______.
Oceanographyhasbeendefinedas"Theapplicationofallsciencestothestudyofthesea".Beforethenineteenthcentury,s
Bigdatacanbedefinedasinformationthatistoobigorcomplextobecontainedorprocessedbyanyonemachineorperson.
DuringatriptoobservewildanimalsinAfrica,Iencounteredtheleastbraveanimalonearth,thewildebeest(角马).Isatona
Itwas3am,acoldandwetnight,onAugust21,2010.IhadjustleftalocalclubtotraveltenkilometershomewhenIlost【C1
Evaluatethefollowing.(a)15-(6-4)(-2)(b)(2-17)÷5(c)(60÷12)-(-7+4)(d)(3)4-(-2)3(e)(-5)(-3)-15(f)(-2)4(15-18)4(g)(20÷5)2
随机试题
简述定性分析中的内部效度的含义及其分类。
在一个长度为n的数组中删除第i个元素(1≤i≤n)时,需要向前移动的元素的个数是_______。
夫颛臾,昔者先王以为东蒙主。主:
患者,男性,30岁。车祸致颈椎骨折,胸3平面以下皮肤感觉消失,拟择期行椎管减压内固定术。该患者最佳的麻醉方式是
A.羟基化代谢B.环氧化代谢C.N—脱甲基代谢D.S—氧化代谢E.脱S代谢阿米替林在体内可发生()。
诱发或加重心力衰竭的因素中最常见的是
张女士为A市甲超市财务管理人员,她从2014年1月份开始建立家庭消费电子账,6月份从甲超市购买了下列商品:(1)粉底液一盒,支出400元。(2)白酒1000克,支出640元。(3)食品支出1010元,其中:橄榄油2500克,支出400元;淀粉1000
某大学将在赵、钱、孙、李、周、吴等6位同学中选拔几位参加全国大学生数学建模竞赛。通过一段时间的训练考察,老师们对这6位同学形成如下共识:(1)不选拔赵;(2)或者选拔孙,或者不选拔钱;(3)如果选拔李,则不选拔周;
数据库设计的四个阶段是:需求分析、概念设计、逻辑设计和()。
Youshouldnotfearspidersbecauseoftheirpoison.OfallthespidersinNorthAmerica,onlyonekindisvery【B1】______andmos
最新回复
(
0
)