开发者:上海品职教育科技有限公司 隐私政策详情

应用版本:4.2.11(IOS)|3.2.5(安卓)APP下载

华赞 · 2024年04月16日

A不理解

NO.PZ2020010303000009

问题如下:

Either using a Z table or the Excel function NORM.S.DIST, compute

a. Pr(-1.5 < Z < 0), where Z ∼ N(0, 1)

b. Pr(Z < -1.5), where Z ∼ N(0, 1)

c. Pr(-1.5 < X < 0), where X ∼ N(1, 2)

d. Pr(X > 2), where X ∼ N(1, 2)

e. Pr(W > 12), where W ∼ N(3, 9)

解释:

a. 43.3%. In Excel, the command to compute this value is NORM.S.DIST(0,TRUE) – NORM.S.DIST(-1.5,TRUE).

b. 6.7%. In Excel, the command to compute this value is NORM.S.DIST(-1.5,TRUE).

c. 20.1%. In Excel, the command to compute this value is NORM.S.DIST((0 – 1)/SQRT(2),TRUE) – NORM.S.DIST((-1.5-1)/SQRT(2),TRUE).

d. 24.0%. In Excel, the command to compute this value is 1 – NORM.S.DIST((2 – 1)/SQRT(2),TRUE).

e. 0.13%. In Excel, the command to compute this value is 1 – NORM.S.DIST((12 – 3)/3,TRUE).

-1·5

1 个答案

pzqa39 · 2024年04月16日

嗨,爱思考的PZer你好:


要使用标准正态分布表(Z-table)查找 Pr(-1.5 < Z < 0),其中 Z ∼ N(0, 1),即 Z 服从均值为 0、标准差为 1 的标准正态分布,按照以下步骤进行:

确定查找范围:

  • 已知要查找的是 Pr(-1.5 < Z < 0),即 Z 值落在 -1.5 到 0 之间的概率。

查找两个临界值的概率:

  • 分别查找 Z = -1.5 和 Z = 0 对应的概率值。Z-table 通常列出从左侧到右侧的 Z 值及其对应的累积概率(也称作正态分布函数值,记作 Φ(Z) 或 P(Z ≤ z))。
  • 查找 Z = -1.5 的概率: 查找 Z-table 中与 -1.5 对应的那一行 =0.0068
  • 查找 Z = 0 的概率: 因为 Z = 0 是标准正态分布的均值,所以其累积概率= 0.5

计算所需概率:

  • 所求概率 Pr(-1.5 < Z < 0) 实际上是 Z 在 -1.5 和 0 之间取值的累积概率,即:
  • Pr(-1.5 < Z < 0) = Φ(0) - Φ(-1.5)=0.5-0.0068 = 0.433



----------------------------------------------
就算太阳没有迎着我们而来,我们正在朝着它而去,加油!

  • 1

    回答
  • 0

    关注
  • 206

    浏览
相关问题

NO.PZ2020010303000009 问题如下 Either using a Z table or the Excel function NORM.S.ST, compute Pr(-1.5 Z 0), where Z ∼ N(0, 1) Pr(Z -1.5), where Z ∼ N(0, 1) Pr(-1.5 X 0), where X ∼ N(1, 2) Pr(X 2), where X ∼ N(1, 2) e. Pr(W 12), where W ∼ N(3, 9) 43.3%. In Excel, the commanto compute this value is NORM.S.ST(0,TRUE) – NORM.S.ST(-1.5,TRUE).6.7%. In Excel, the commanto compute this value is NORM.S.ST(-1.5,TRUE).20.1%. In Excel, the commanto compute this value is NORM.S.ST((0 – 1)/SQRT(2),TRUE) – NORM.S.ST((-1.5-1)/SQRT(2),TRUE). 24.0%. In Excel, the commanto compute this value is 1 – NORM.S.ST((2 – 1)/SQRT(2),TRUE).e. 0.13%. In Excel, the commanto compute this value is 1 – NORM.S.ST((12 – 3)/3,TRUE). excel function NORM.S.ST 这是Excel的计算公式吗?这个也需要掌握吗

2024-01-15 00:04 1 · 回答

NO.PZ2020010303000009 问题如下 Either using a Z table or the Excel function NORM.S.ST, compute Pr(-1.5 Z 0), where Z ∼ N(0, 1) Pr(Z -1.5), where Z ∼ N(0, 1) Pr(-1.5 X 0), where X ∼ N(1, 2) Pr(X 2), where X ∼ N(1, 2) e. Pr(W 12), where W ∼ N(3, 9) 43.3%. In Excel, the commanto compute this value is NORM.S.ST(0,TRUE) – NORM.S.ST(-1.5,TRUE).6.7%. In Excel, the commanto compute this value is NORM.S.ST(-1.5,TRUE).20.1%. In Excel, the commanto compute this value is NORM.S.ST((0 – 1)/SQRT(2),TRUE) – NORM.S.ST((-1.5-1)/SQRT(2),TRUE). 24.0%. In Excel, the commanto compute this value is 1 – NORM.S.ST((2 – 1)/SQRT(2),TRUE).e. 0.13%. In Excel, the commanto compute this value is 1 – NORM.S.ST((12 – 3)/3,TRUE). 这道题除了有超出给定表的数据,还有无法精准得出的,比如1.5,在表单中只有接近1.5的数据,这种情况怎么计算?

2024-01-14 23:32 2 · 回答

NO.PZ2020010303000009 问题如下 Either using a Z table or the Excel function NORM.S.ST, compute Pr(-1.5 Z 0), where Z ∼ N(0, 1) Pr(Z -1.5), where Z ∼ N(0, 1) Pr(-1.5 X 0), where X ∼ N(1, 2) Pr(X 2), where X ∼ N(1, 2) e. Pr(W 12), where W ∼ N(3, 9) 43.3%. In Excel, the commanto compute this value is NORM.S.ST(0,TRUE) – NORM.S.ST(-1.5,TRUE).6.7%. In Excel, the commanto compute this value is NORM.S.ST(-1.5,TRUE).20.1%. In Excel, the commanto compute this value is NORM.S.ST((0 – 1)/SQRT(2),TRUE) – NORM.S.ST((-1.5-1)/SQRT(2),TRUE). 24.0%. In Excel, the commanto compute this value is 1 – NORM.S.ST((2 – 1)/SQRT(2),TRUE).e. 0.13%. In Excel, the commanto compute this value is 1 – NORM.S.ST((12 – 3)/3,TRUE). 是不是可以标准化到 P(-1.77 X -0.71)这个式子,在去查表但是-1.77超过了将以中给的表的范围

2023-02-26 15:41 1 · 回答

NO.PZ2020010303000009 问题如下 Either using a Z table or the Excel function NORM.S.ST, compute Pr(-1.5 Z 0), where Z ∼ N(0, 1) Pr(Z -1.5), where Z ∼ N(0, 1) Pr(-1.5 X 0), where X ∼ N(1, 2) Pr(X 2), where X ∼ N(1, 2) e. Pr(W 12), where W ∼ N(3, 9) 43.3%. In Excel, the commanto compute this value is NORM.S.ST(0,TRUE) – NORM.S.ST(-1.5,TRUE).6.7%. In Excel, the commanto compute this value is NORM.S.ST(-1.5,TRUE).20.1%. In Excel, the commanto compute this value is NORM.S.ST((0 – 1)/SQRT(2),TRUE) – NORM.S.ST((-1.5-1)/SQRT(2),TRUE). 24.0%. In Excel, the commanto compute this value is 1 – NORM.S.ST((2 – 1)/SQRT(2),TRUE).e. 0.13%. In Excel, the commanto compute this value is 1 – NORM.S.ST((12 – 3)/3,TRUE). 具体怎么做呢?请问能用算式一下吗

2023-01-31 10:24 2 · 回答