मराठी
महाराष्ट्र राज्य शिक्षण मंडळएचएससी विज्ञान (सामान्य) इयत्ता १२ वी

Given X ~ B(n, P) if n = 25 and E(X) = 10, find p and SD(X). - Mathematics and Statistics

Advertisements
Advertisements

प्रश्न

Given X ~ B(n, P) if n = 25 and E(X) = 10, find p and SD(X).

बेरीज
Advertisements

उत्तर

Given: n = 25 and  E(X) = 10

E(X) = np

∴ 10 = 25 × p

∴ p = `10/25 = 2/5`

∴ q = 1 - p = `1 - 2/5 = 3/5`

Var(X) = npq

`= 25 × 2/5 × 3/5 = 6`

∴ SD(X) = `sqrt("Var"("X")) = sqrt6`

Hence, p = `2/5`, S.D.(X) = `sqrt6`

shaalaa.com
  या प्रश्नात किंवा उत्तरात काही त्रुटी आहे का?
पाठ 8: Binomial Distribution - Exercise 8.1 [पृष्ठ २५२]

APPEARS IN

बालभारती Mathematics and Statistics 2 (Arts and Science) [English] Standard 12 Maharashtra State Board
पाठ 8 Binomial Distribution
Exercise 8.1 | Q 12.3 | पृष्ठ २५२
Share
Notifications

Englishहिंदीमराठी


      Forgot password?
Use app×