gre 提问 有人么 The figure above shows the standard normal distri
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gre 提问 有人么 The figure above shows the standard normal distribution,with mean 0 and
The figure above shows the standard normal distribution,with mean 0 and
standard deviation 1,including approximate percents of the distribution
corresponding to the six regions shown.
The random variable Y is normally distributed with a mean of 470,and the value
Y = 340 is at the 15th percentile of the distribution.Of the following,which is the
best estimate of the standard deviation of the distribution?
![](http://img.wesiedu.com/upload/1/0a/10a17c9b010c86cdacc41b66fc956a51.jpg)
The figure above shows the standard normal distribution,with mean 0 and
standard deviation 1,including approximate percents of the distribution
corresponding to the six regions shown.
The random variable Y is normally distributed with a mean of 470,and the value
Y = 340 is at the 15th percentile of the distribution.Of the following,which is the
best estimate of the standard deviation of the distribution?
![](http://img.wesiedu.com/upload/1/0a/10a17c9b010c86cdacc41b66fc956a51.jpg)
上图所示为标准正态分布,均值为0,
标准偏差1,包括对应所示六个区域分布近似百分比 .
随机变量Y服从正态分布,均值为470,值
Y =340 位于分布的第15百分位.以下哪一个是该
分布的标准偏差最佳估计值?
再问: 125是答案~请问下是怎么选出来的
标准偏差1,包括对应所示六个区域分布近似百分比 .
随机变量Y服从正态分布,均值为470,值
Y =340 位于分布的第15百分位.以下哪一个是该
分布的标准偏差最佳估计值?
再问: 125是答案~请问下是怎么选出来的
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