a+random+sample
答:random sample是随机采样的意思。在采取子样时,对采样的部位或时间均不施加任何人为的意志。对一个生物的总体,机会均等地抽取样本,估计其总体的某种生物学特性的方法,按照随机的原则,即保证总体中每个单位都有同等机会被抽中的原则抽取样本的方法。根据样本资料推论总体时,可用概率的方式客观地测量推...
答:2. We need to take a sample of your blood for testing.我们需要取您的血样进行测试。3. The company is sampling its new range of ice creams.这家公司正在抽样试吃它的新系列冰淇淋。4. A random sample of people was selected for the survey.随机选择了一些人进行调查。5. We sampled t...
答:1、sample size - 样本大小,指用于分析或测试的样品数量。2、take a sample - 取样,采样。3、 random sample - 随机样本,由随机选取的代表性样品组成。4、sample rate - 采样率,指每秒钟采集到的样品数量。双语例句:1、The lab technician spent several hours on sample preparation to ensure ...
答:随机抽样的英文:random sampling。常用短语:非随机抽祥法:nonrandom sampling.单次随机抽样 :Single Random Sampling.随机抽样法:Random Sampling Method.随机采(抽)样:Randomsampling , Stochasticsampling.拟随机抽样:Quasi Random Sampling.随机抽样推测法:Random Sampling Guesswork Method.造句:1、Pr...
答:random 英[ˈrændəm] 美[ˈrændəm]adj. 随机的; 任意的; 胡乱的;n. 随意; 偶然的行动;[例句]The survey used a random sample of two thousand people across England and Wales 该调查在英格兰和威尔士随机抽样了2,000人。
答:Place items here and pay a fee to receive random enchantments.把物品放在这里并支付一定的费用可以使物品获得一个随机的附魔 The information is processed in a random order.信息是按随机顺序处理的。The interviews were given to a random sample of students.随机抽选出部分学生进行了采访。Names ...
答:random的意思:随机的。例句:Place items here and pay a fee to receive random enchantments.把物品放在这里并支付一定的费用可以使物品获得一个随机的附魔。The information is processed in a random order.信息是按随机顺序处理的。The interviews were given to a random sample of students.随机...
答:As part of its efforts to reduce customer churn, a telecommunications company is interested in examining the "time to churn". To this end, a random sample of customers is selected and their time spent as customers, whether they are still active customers, and various demographic ...
答:the sample must be random. A random sample is one in which every member of a population has an equal chance to be selected. A parameter is a characteristic of a population. A statistic is a characteristic of a sample. Inferential statistics enables you to make an educated guess ...
答:Random的例句:1、The information is processed in a random order.信息是按随机顺序处理的。2、Names were chosen at random from a list.名字是从名单中随便点的。3、The interviews were given to a random sample of students.随机抽选出部分学生进行了采访。4、We received several answers, and...
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敖剑19276235712:
一道大学统计题A random sample of size n=24 is taken from a distribution with probability density function:f(x) = 1/9(x+5/2) if 1 -
30146赫巩
:[答案] 是不是应该先求出xbar的期望值和标准差,然后利用 a=(xbar-期望值)/标准差为标准正态分布来计算那个概率,这期间可能利用了大数定律和中心极限定理.仅供参考.
敖剑19276235712:
java获取一个1到100的之间的随机数 然后判断他是偶数还是奇数 -
30146赫巩
: public class random { public static void...
敖剑19276235712:
编写一个程序,随机产生三个20以内的整数作为三角形的三条边,判断能否构成三角形 -
30146赫巩
: 可以使用Math.radom():产生一个[0.0,1.0)之间的一个双精度实数.public class SanJiaoXing{ public static void main(String...
敖剑19276235712:
英语翻译simple random sampling:A sample of n subjects is selected in such a way that every possible sample of the same size n has the same chance of being... -
30146赫巩
:[答案] 简单随机抽样:由N个个体组成的样本,每个个体都是从具有相同样本容量N和相同几率被抽取的样本中选出
敖剑19276235712:
matlab 中抽取随机数的函数 -
30146赫巩
: 设取值区间为[a,b],则要在此区间选取一个随机数,程序为:a=rand()*(b-a)+a若要求随机数是整数,则程序为:a=ceil(rand()*(b-a))+a这样即可!!!
敖剑19276235712:
A sampling distribution problem? A random sample of size 81 is drawn from a population with a stand -
30146赫巩
: 一个抽样分布问题.从一个总体中抽取81个数据的随机样本.已知总体的标准差为16,如果抽取的样本的平均值大于300的概率仅为18%,那么总体的均值为多少?设总体均值为mu不管总体服从什么分布,样本均值均服从正态分布N(mu, 256/81)P(x>300)=18%18%的分位数为:NORMINV(0.84,0,1)=0.9945(300-mu)/(16/9)=0.9945mu=298
敖剑19276235712:
英文翻译 谢谢 (如果是机器翻译的就不要黏上来了多谢) -
30146赫巩
: a randomsample of fire departments for references to those concepts in their mission
敖剑19276235712:
pascal中 trunc和random都是什么意思? -
30146赫巩
: trunc为取整函数,格式trunc(a),例:trunc(3.45)为3 random为随机,但需与randomize;一起用,如:randomize;换行 x:等于random(9000)+1000; 表示随机产生一个四位数;第二...
敖剑19276235712:
C++ 随机两个整数1 - 9相加直到等于或大于50 结束 -
30146赫巩
: 代码如下 仅供参考#include #include #include using namespace std;int get(){ int a,b; a = random()%9+1; b = random...
敖剑19276235712:
java编写程序实现以下功能 -
30146赫巩
: public static void main(String[] args) {test(); }public static void test() { String tempStr=""; for(int i=0;i<5000;i++) { dou...