The key thing to remember about random variables is that actual observations are centered around an average, or mean value.

对于随机的变化关键要记住的是，实际的观测资料都在平均数或者中间值周围。

youdao

Becoming other-centered and giving does not mean that you have to sacrifice your feelings, wants and needs in order to satisfy your partner.

为对方着想而付出并不意味着你必须牺牲自己的感情、需求去迎合伴侣。

youdao

Well, the mean is always .2 no matter how many policies you write, so it's going to be--we're going to have a normal distribution centered on .2.

不论你签了多少份保单,均值永远是0.2,所以这就是一个关于x=0.2对称的,正态分布

youdao