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蜗牛也是牛Megan · 2018年10月18日

问一道题:NO.PZ2018062016000088

问题如下图:N(0.11)考试的时候会给出表格吗?课后题都没有表格,没办法计算啊

    

选项:

A.

B.

C.

解释:



1 个答案
已采纳答案

菲菲_品职助教 · 2018年10月18日

同学你好,考试的时候都会给出表格的,这类数据不需要自行记忆。在原版书后面是有相应的表格的。

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NO.PZ2018062016000088问题如下 A stoobeying normstribution ha mereturn of 6% ana stanrviation of 18%. The probability for the stock's return to fall less th4% is:N(0.11) = 0.5438 A.37.91%B.45.62%C.57.68% B is correct. Firstly, stanrze the originnormstributionZ= (x-6%)/18%, so P(x 4%) = P( Z -0.11).NotithN(-0.11) = 1- N(0.11). Baseon the given contion, N(0.11) = 0.5438, so N(-0.11) = 1-0.5438 = 0.4562 = 45.62% 另外题目给的是N也是累积概率的意思吗?为什么给的不是F

2022-10-13 11:19 1 · 回答

NO.PZ2018062016000088问题如下 A stoobeying normstribution ha mereturn of 6% ana stanrviation of 18%. The probability for the stock's return to fall less th4% is:N(0.11) = 0.5438 A.37.91%B.45.62%C.57.68% B is correct. Firstly, stanrze the originnormstributionZ= (x-6%)/18%, so P(x 4%) = P( Z -0.11).NotithN(-0.11) = 1- N(0.11). Baseon the given contion, N(0.11) = 0.5438, so N(-0.11) = 1-0.5438 = 0.4562 = 45.62% 为什么能看出来是FX、有没有可能是T分布、0.11指的就是criticpoint右边区域的面积呢?

2022-09-04 11:03 1 · 回答

NO.PZ2018062016000088 45.62% 57.68% B is correct. Firstly, stanrze the originnormstributionZ= (x-6%)/18%, so P(x <4%) = P( Z<-0.11). NotithN(-0.11) = 1- N(0.11). Baseon the given contion, N(0.11) = 0.5438, so N(-0.11) = 1-0.5438 = 0.4562 = 45.62% 这道题哪句话说的是Z分布,另外x为什么是4呢?不太明白这道题目的意思

2021-11-06 19:42 2 · 回答

45.62% 57.68% B is correct. Firstly, stanrze the originnormstributionZ= (x-6%)/18%, so P(x <4%) = P( Z<-0.11). NotithN(-0.11) = 1- N(0.11). Baseon the given table, N(0.11) = 0.5438, so N(-0.11) = 1-0.5438 = 0.4562 = 45.62%请问考试时如何查表呢?

2021-01-27 22:56 1 · 回答

老师那个0.11是用 (4-6)/18得到的吗?

2020-03-09 23:12 1 · 回答