首页
登录
职称英语
The distribution of the numbers of hours that students at a certain college stud
The distribution of the numbers of hours that students at a certain college stud
游客
2024-01-12
54
管理
问题
The distribution of the numbers of hours that students at a certain college studied for final exams has a mean of 12 hours and a standard deviation of 3 hours. Which of the following numbers of hours are within 2 standard deviations of the mean of the distribution?
Indicate all such numbers.
A 2
B 5
C 10
D 14
E 16
F 20
选项
答案
C,D,E
解析
Given that the mean of the distribution is 12 hours and the standard deviation is 3 hours, the numbers of hours within 2 standard deviations of the mean are all numbers of hours between 12 - 2(3), or 6, and 12 + 2(3), or 18. Thus the correct answer consists of Choices C, D, and E.
This explanation uses the following strategy.
Strategy 1: Translate from Words to an Arithmetic or Algebraic Representation
转载请注明原文地址:https://tihaiku.com/zcyy/3355679.html
相关试题推荐
Manyschoolteacherssaythatasdifficultastheirstudentscanbetodealw
Manyschoolteacherssaythatasdifficultastheirstudentscanbetodealw
Manyschoolteacherssaythatasdifficultastheirstudentscanbetodealw
Manyschoolteacherssaythatasdifficultastheirstudentscanbetodealw
Manyschoolteacherssaythatasdifficultastheirstudentscanbetodealw
Manyschoolteacherssaythatasdifficultastheirstudentscanbetodealw
Manyschoolteacherssaythatasdifficultastheirstudentscanbetodealw
Allthereferencebooksshouldbemade______totheteachersandstudentsinour
______ofthestudentsinourclassarefromthenorth.A、TwoninthB、Secondnint
Manystudentsfindtheexperienceofattendinguniversitylecturestobeac
随机试题
PASSAGEONE[br]Whatmightisolatecliquesaccordingtothepassage?Permanentm
Thatquestion______weneedithasnotbeenconsidered.A、howB、whetherC、thatD、w
[audioFiles]2017m5s/audio_ezfj_197_201705[/audioFiles]WaterWaterisa
Theorganizationseekstoinsure(equally)______ofpayformenandwomen.equal
Duringthetraditionalweddingceremony,thebridalcouplepromiseeachothe
Completetheform.WriteNOMORETHANTHREEWORDSforeachanswer.PERSONALDETA
1648年()会议,为了“结束欧洲30年战争”,开启了以国际会议方式协调国家关系
感染性休克气阴亏竭证的首选方剂是A.清瘟败毒饮合小承气汤 B.生脉散 C.参
以“生活教育”为理念,创办中国化、平民化的幼稚园,建立生活教育课程理论体系的是(
下列关于水泵及给水管路的设计方案正确的是()。A.消防水泵从市政管网直接抽水,
最新回复
(
0
)