z*********o 发帖数: 541 | 1 第一题中是根据哪个公式从第二个式子到第一个式子的?
第二题如何从左边变成右边的,怎莫解释呢?
谢谢 | s**********l 发帖数: 629 | 2
I don't remember the definition of tPx:y, and I don't have the book with me.
But if you want to provide me with this definition, I can help. Otherwise
, for the middle part of the equation to the right hand side, it's easily
understood as the following:
25P25 x 25P50 = 50P25
think of it as one person, then it's all very very basic probabilities.
Remember that all Ps and Qs revolve back to basic probabilities learned in
Course P!
[Probability of a 25-year-old living for another 25 years, or
【在 z*********o 的大作中提到】 : 第一题中是根据哪个公式从第二个式子到第一个式子的? : 第二题如何从左边变成右边的,怎莫解释呢? : 谢谢
| G******y 发帖数: 1831 | 3 ft, 你太耐心了, 这个student问的东西太基本了,这些都需要自己看书弄懂
1. 需要independence condition, tPxy = tPx * tPy
2. That is a fundamental formula for survival, i.e., to survive n years,
the person needs to survive every single year,just multiplication rule
in probability theory
me.
Otherwise
【在 s**********l 的大作中提到】 : : I don't remember the definition of tPx:y, and I don't have the book with me. : But if you want to provide me with this definition, I can help. Otherwise : , for the middle part of the equation to the right hand side, it's easily : understood as the following: : 25P25 x 25P50 = 50P25 : think of it as one person, then it's all very very basic probabilities. : Remember that all Ps and Qs revolve back to basic probabilities learned in : Course P! : [Probability of a 25-year-old living for another 25 years, or
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