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: 20. A random variable X has probability density f ( x ) = (1 / 7)(1 + 2 x1 / 2 ) for 1 ≤ x ≤ 4. Find the mean and variance of X . 1 21. Suppose that baseball player salaries in units of hundreds of thousands of dollars have a probability density f ( x ) = cx9 / 4 for x ≥ 1. (a) Find the constant c to make this a probability density. (b) What fraction of players make more than 10 million dollars (100 hundred thousand) (c) Find the average players salary. (d) Find the variance. 2...
View
Full
Document
This note was uploaded on 11/14/2007 for the course MATH 1106 taught by Professor Durrett during the Spring '07 term at Cornell.
 Spring '07
 DURRETT
 Calculus, Definite Integrals, Derivative, Integrals

Click to edit the document details