This preview shows page 1. Sign up to view the full content.
Unformatted text preview: probability that the seventh time the laptop needs repair will be after 3 years, when the warranty expires. P ( T 7 > 3 ) = P ( X 3 6 ) = P ( Poisson ( 9 ) 6 ) = 0.207 . OR P ( T 7 > 3 ) = ( ) 3 3 1 7 7 7 3 dt t t e = 3 3 6 7 6 3 ! dt t t e = b) (6) Find the probability that the seventh time the laptop needs repair will be during the second year of warranty. P ( 1 < T 7 < 2 ) = P ( T 7 > 1 ) P ( T 7 > 2 ) = P ( X 1 6 ) P ( X 2 6 ) = P ( Poisson ( 3 ) 6 ) P ( Poisson ( 6 ) 6 ) = 0.966 0.606 = 0.360 . OR P ( 1 < T 7 < 2 ) = ( )  2 1 3 1 7 7 7 3 dt t t e = 2 1 3 6 7 6 3 ! dt t t e =...
View Full
Document
 Spring '08
 Kim
 Statistics, Probability

Click to edit the document details