问题如下图：
选项：
A. 
B. 
C. 
D. 
解释：
看了过去的答疑依然不能让我信服、、、怎么办、、、、
品职答疑小助手雍 · 2019年07月02日
同学你好，能说下具体哪个点不让你信服么？因为我看前面的提问已经把这题的各个方面都答的差不多了。
真的没办法的话，就只能当成结论来记了
ysr1990 · 2019年07月02日
我就是觉得这里面的successful rate不是lamda。。。。应该是p。。。而且lamda的最大值为啥是1。。。。
品职答疑小助手雍 · 2019年07月02日
我觉得这不算是个问题吧，因为本身poisson分布里参数就没有n和p这两个，只有λ。 n和p是在提到二项分布趋向于泊松分布时提到的二项分布里的参数。
ysr1990 · 2019年07月02日
哦好吧。。。。是的哦。。。。那为啥lamda最大值等于1呢
品职答疑小助手雍 · 2019年07月02日
λ是可能大于1的，不过只有在次数很多，且λ趋近1时候才会趋向正态分布。
NO.PZ2016062402000016 When cyou use the normstribution to approximate the Poisson stribution, assuming you have n inpennt trials, eawith a probability of success of p? When the meof the Poisson stribution is very small When the varianof the Poisson stribution is very small When the number of observations is very large anthe success rate is close to 1 When the number of observations is very large anthe success rate is close to 0 The normapproximation to the Poisson improves when the success rate, χ, is very high. Because this is also the meanvariance, answers A anare wrong. In turn, the binominsity is well approximatethe Poisson nsity when np = χ is large. 辅导员，这里也是没明白为啥要接近于1，数据的规模这个是没有问题
When cyou use the normstribution to approximate the Poisson stribution, assuming you have n inpennt trials, eawith a probability of success of p? When the meof the Poisson stribution is very small When the varianof the Poisson stribution is very small When the number of observations is very large anthe success rate is close to 1 When the number of observations is very large anthe success rate is close to 0 The normapproximation to the Poisson improves when the success rate, χ, is very high. Because this is also the meanvariance, answers A anare wrong. In turn, the binominsity is well approximatethe Poisson nsity when np = χ is large. 请问这个success rate为什么要接近1呢 不是np越大就可以越好的approximate么
When cyou use the normstribution to approximate the Poisson stribution, assuming you have n inpennt trials, eawith a probability of success of p? When the meof the Poisson stribution is very small When the varianof the Poisson stribution is very small When the number of observations is very large anthe success rate is close to 1 When the number of observations is very large anthe success rate is close to 0 The normapproximation to the Poisson improves when the success rate, χ, is very high. Because this is also the meanvariance, answers A anare wrong. In turn, the binominsity is well approximatethe Poisson nsity when np = χ is large. P->0, 为什么不选
When cyou use the normstribution to approximate the Poisson stribution, assuming you have n inpennt trials, eawith a probability of success of p? When the meof the Poisson stribution is very small When the varianof the Poisson stribution is very small When the number of observations is very large anthe success rate is close to 1 When the number of observations is very large anthe success rate is close to 0 The normapproximation to the Poisson improves when the success rate, χ, is very high. Because this is also the meanvariance, answers A anare wrong. In turn, the binominsity is well approximatethe Poisson nsity when np = χ is large. 为啥不选possion分布的适用条件不是概率很小，N很大吗？老师讲的
P不可能大，所以np很大的实质就是n很大对吧？