chg5 - Y = f(X) Y = f(X) a- Trng hp X la ai lng ngau nhien...

Info iconThis preview shows pages 1–12. Sign up to view the full content.

View Full Document Right Arrow Icon

Info iconThis preview has intentionally blurred sections. Sign up to view the full version.

View Full DocumentRight Arrow Icon

Info iconThis preview has intentionally blurred sections. Sign up to view the full version.

View Full DocumentRight Arrow Icon

Info iconThis preview has intentionally blurred sections. Sign up to view the full version.

View Full DocumentRight Arrow Icon

Info iconThis preview has intentionally blurred sections. Sign up to view the full version.

View Full DocumentRight Arrow Icon

Info iconThis preview has intentionally blurred sections. Sign up to view the full version.

View Full DocumentRight Arrow Icon

Info iconThis preview has intentionally blurred sections. Sign up to view the full version.

View Full DocumentRight Arrow Icon
This is the end of the preview. Sign up to access the rest of the document.

Unformatted text preview: Y = f(X) Y = f(X) a- Trng hp X la ai lng ngau nhien ri rac va ng vi cac gia tr khac nhau cua X ta co cac gia tr khac nhau cua Y Th du 1 Th du 1 : : ai lng ngau nhien X co bang phan phoi xac suat nh sau: X 2 3 4 P 0,3 0,5 0,2 Tm qui luat phan phoi xac suat cua Y = 2X + 5 Giai: Giai: Cac gia tr ma Y co the nhan la: y 1 = 2*2 + 5 = 9; y 2 = 3*2 + 5 = 11; y 3 = 4*2 + 5 = 13; P(Y= 9) = P(X= 2) = 0,3; P(Y= 11) = P(X= 3) = 0,5; Vay phan phoi xac suat cua Y nh sau: Y 9 11 13 P 0,3 0,5 0,2 b- b- Neu tng ng vi hai gia tr Neu tng ng vi hai gia tr cua X ta co mot gia tr cua Y cua X ta co mot gia tr cua Y Th du 2 Th du 2 : : ai lng ngau nhien X co bang phan phoi xac suat nh sau: Tm qui luat phan phoi xac suat cua Y = X 2 + 3 X-2 1 2 P 0,1 0,4 0,5 Khi X= - 2 th Y= (- 2) 2 + 3 = 7; Khi X= 1 th Y= 1 2 + 3 = 4; Khi X= 2 th Y= 2 2 + 3 = 7; Giai Giai : : Nh vay: (Y= 7) = (X= - 2) (X= 2) Do o: P(Y= 7) = P(X=- 2) + P(X= 2) = 0,6 P(Y = 4) = P(X = 1) = 0,4 Va y qui lua t pha n phoi xac sua t cua Y nh sau: Y Y 4 7 P P 0,4 0,6 Y = Y = (X, Z) (X, Z) Th du Th du : : Xac suat e may th nhat san xuat c san pham loai A la 0,8. Xac suat nay oi vi may th hai la 0,7. Cho may th nhat san suat 3 san pham va may th hai san xuat 1 san pham....
View Full Document

Page1 / 29

chg5 - Y = f(X) Y = f(X) a- Trng hp X la ai lng ngau nhien...

This preview shows document pages 1 - 12. Sign up to view the full document.

View Full Document Right Arrow Icon
Ask a homework question - tutors are online