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
41
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
Longbusridesareliketelevisionshows.Theyhaveabeginning,amiddle,a
A、Givethestudentstheorientationpacks.B、Handoverthekeystothestudents.
A—CapitalCityB—KeyCityC—CommonCityD—ProvincialBoun
简述学年体育教学计划制定的基本内容。
运维班应设专人负责备品备件管理,严格按照相关规定和设备说明书进行存放,认真落实备
在非营利性生产单位总产出中,属于经常性费用的有()。A.劳动报酬 B.职工
C
下列说法正确的是:() A.税务机关对纳税人欠缴税款的情形定期公布 B.纳
计日工是指在工程实施过程中,业主有一些临时性的或新增加的项目需要按计日(或计量)
肾、输尿管结石的血尿特点为A.严重血尿伴血凝块 B.无痛性全程血尿 C.终末
最新回复
(
0
)