But above all, they are betting on the law of large numbers.
但是除此以外,他们还寄期望与大数定律。
单词 | Laws of large numbers |
释义 |
Laws of large numbers
原声例句
经济学人(汇总) But above all, they are betting on the law of large numbers. 但是除此以外,他们还寄期望与大数定律。 可汗学院:统计学(视频版) But what the law of large numbers says, well, I don't care how many trials this is. 但是大数定律说的是,好吧,我不在乎这是多少次试验。 可汗学院:统计学(视频版) The law of large numbers just tells us that my sample mean will approach my expected value of the random variable. 大数定律只是告诉我们,我的样本均值将接近我对随机变量的期望值。 可汗学院:统计学(视频版) So you might say that the law of large numbers tell this, OK, after we've done 3 trials and our average is there. 所以你可能会说大数定律告诉我们,好吧,在我们完成 3 次试验并且我们的平均值就在那里之后。 可汗学院:统计学(视频版) The law of large numbers just tells us that this the average-- the average of all of my observations, is going to converge to 50 as n approaches infinity. 大数定律告诉我们,当 n 接近无穷大时,这个平均值——我所有观察结果的平均值,将收敛到 50。 可汗学院:统计学(视频版) The law of large numbers just says that if we take a sample of n observations of our random variable, and if we were to average all of those observations-- and let me define another variable. 大数定律只是说,如果我们从随机变量的 n 个观测值中抽取一个样本,并且如果我们要对所有这些观测值取平均值——让我定义另一个变量。 可汗学院:统计学(视频版) The law of large numbers will just tell us that-- let's say I have a random variable-- X is equal to the number of heads after 100 tosses of a fair coin-- tosses or flips of a fair coin. 大数定律只会告诉我们——假设我有一个随机变量——X 等于抛硬币 100 次后正面朝上的次数——抛硬币或抛硬币。 可汗学院:统计学(视频版) What the law of large numbers tells us is that it doesn't care-- let's say after some finite number of trials your average actually-- it's a low probability of this happening, but let's say your average is actually up here. 大数定律告诉我们的是,它并不关心——假设经过一些有限次数的试验后你的平均值实际上——发生这种情况的可能性很低,但假设你的平均值实际上在这里。
中文百科
大数定律 Law of large numbers(重定向自Laws of large numbers)
![]() ![]() ![]() ![]() 在数学与统计学中,大数定律又称大数法则、大数律,是描述相当多次数重复实验的结果的定律。根据这个定律知道,样本数量越多,则其平均就越趋近期望值。 大数定律很重要,因为它“保证”了一些随机事件的均值的长期稳定性。人们发现,在重复试验中,随着试验次数的增加,事件发生的频率趋于一个稳定值;人们同时也发现,在对物理量的测量实践中,测定值的算术平均也具有稳定性。比如,我们向上抛一枚硬币,硬币落下后哪一面朝上本来是偶然的,但当我们上抛硬币的次数足够多后,达到上万次甚至几十万几百万次以后,我们就会发现,硬币每一面向上的次数约占总次数的二分之一。偶然必然中包含着必然。
英语百科
Law of large numbers 大数定律(重定向自Laws of large numbers)
![]() ![]() ![]() ![]() In probability theory, the law of large numbers (LLN) is a theorem that describes the result of performing the same experiment a large number of times. According to the law, the average of the results obtained from a large number of trials should be close to the expected value, and will tend to become closer as more trials are performed. |
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