中心极限定律
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中心极限定律 [2023/03/12 01:47] – zhangruihao | 中心极限定律 [2024/03/15 04:57] (当前版本) – 2104龚文滕 | ||
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- | **标准误(standard of error)**,指样本均值分布的标准差,是反映样本均值分布变异性的指标。 | + | **标准误(standard of error)** |
- | 定义式为σ/ | + | *指样本均值分布的标准差,是反映样本均值分布变异性的指标。 |
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- | **大数定律(law of large numbers)**:随样本容量的的增大,样本均值与总体均值之间的误差会减小。 | + | |
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+ | *Standard error is the standard deviation of the sample mean distribution, | ||
+ | *The definition formula is σ/√n, σ is the standard deviation of the population, and n is the sample size. | ||
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+ | **大数定律(law of large numbers)** | ||
+ | *随样本容量的的增大,样本均值与总体均值之间的误差会减小。 | ||
+ | *Law of large numbers: As the sample size increases, the error between the sample mean and the population mean will decrease. | ||
+ | **中心极限定律(central limit theorem)** | ||
+ | *对于任何均值为μ,标准差为σ的总体, | ||
+ | *应用条件:通常在n≥30时,我们认为样本均值的分布满足中心极限定律。 | ||
+ | *中心极限定律综合了样本均值的三个主要特性:形状、均值和方差。 | ||
- | **中心极限定律(central limit theorem)**: | + | *For any population with a mean of μ and a standard deviation of σ, and a sample size of n, the distribution of the mean will approach a normal distribution with a mean of μ and a standard deviation of σ/ |
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中心极限定律.1678585651.txt.gz · 最后更改: 2023/03/12 01:47 由 zhangruihao