This preview shows pages 1–2. Sign up to view the full content.
This preview has intentionally blurred sections. Sign up to view the full version.
View Full Document
Unformatted text preview: is given by P ( X 1 . 25) = F (1 . 25) = 5 32 = 0 . 156250 . 1 The probability that a student fnishes between 1.5 and 2 hours is P (1 . 5 < X < 2) = F (2)F (1 . 5) = 1. 5 = 1 2 . 4. We need the distribution Function. Using that For t (1 , 2) we have i t 1 f ( x ) dx = 22 t , we have F ( t ) = t < 1 22 /t 1 t < 2 1 2 t . To answer part (a) we want P ( X < 1 . 5) = F (1 . 5) = 22 * 2 3 = 2 / 3 . or part (b) we want P (1 < X < 1 . 25  X < 1 . 5) = P (1 < X < 1 . 25 , X < 1 . 5) P ( X < 1 . 5) = P (1 < X < 1 . 25) P ( X < 1 . 5) = F (1 . 25)F (1) F (1 . 5) = 22 / 1 . 25 (2 / 3) = 3 / 5 . 2...
View Full
Document
 Spring '08
 Anderson
 Probability

Click to edit the document details