6.4: Sura ya Tathmini ya Mfumo
- Page ID
- 179207
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Utangulizi
\(X \sim N(\mu, \sigma)\)
\(\mu =\)maana;\(\sigma =\) kupotoka kwa kawaida
Usambazaji wa kawaida wa kawaida
\(Z \sim N(0, 1)\)
\(z = a\)thamani sanifu (z-alama)
maana = 0; kiwango cha kupotoka = 1
Ili kupata\(k^{\text{th}}\) asilimia ya\(X\) wakati alama za z zinajulikana:
\(k = \mu + (z)\sigma\)
z-alama:\(z=\frac{x-\mu}{\sigma}\) au\(z=\frac{|x-\mu|}{\sigma}\)
\(Z =\)variable random kwa z-alama
\(Z \sim N(0, 1)\)
Kukadiria Binomial na Usambazaji wa kawaida
Usambazaji wa kawaida:\(X \sim N(\mu, \sigma)\) wapi\(\mu\) maana na\(\sigma\) ni kupotoka kwa kiwango.
Standard Kawaida Usambazaji:\(Z \sim N(0, 1)\).