GRE数学正态分布A random variable Y is normally distributed with a mean of 200 and a standard deviation of 10.比较 the probability of the event that the value of Y is greater than 220,与 1/6.下面为答案解析：（有些看不明 1-（50%+95%/2）
2019-03-29
GRE数学正态分布
A random variable Y is normally distributed with a mean of 200 and a standard deviation of 10.比较 the probability of the event that the value of Y is greater than 220,与 1/6.
下面为答案解析：（有些看不明 1-（50%+95%/2）
优质解答
在180--220的概率为大约95%,大于220的概率为(1-95%）/2=0.025
在180--220的概率为大约95%,大于220的概率为(1-95%）/2=0.025