stat400lec4 - Statistics 400 Lecture 4 Methods of...

Info iconThis preview shows pages 1–3. Sign up to view the full content.

View Full Document Right Arrow Icon
Statistics 400 Lecture 4 Methods of Enumeration Multiplication Principle: Suppose that an experiment E1 has n1 outcomes and an experiment E2 has n2 possible outcomes. The composite experiment E1E2 has n1*n2 outcomes. Example: There are 5 seats in a classroom and 5 students registered for a class. How many seating arrangements do we have? Definition 2.2-1 Each of the n! arrangements of n different objects is called a permutation of the n objects. Example: There are only 3 seats in a classroom and 5 students registered for a class. How many seating arrangements do we have? Definition 2.2-2 Each of the n P r arrangements is called a permutation of the n objects taken r at a time . )! ( ! r n n P r n - = Ping Ma Lecture 4 Fall 2005 - 1 -
Background image of page 1

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

View Full DocumentRight Arrow Icon
Example : The number of ways of selecting a president, a vice president in a club which has 10 members. Definition 2.2-3 If r objects are selected from a set of n objects, and the order of selection is noted, the selected set of r objects is called an ordered sample of size r
Background image of page 2
Image of page 3
This is the end of the preview. Sign up to access the rest of the document.

This note was uploaded on 07/24/2008 for the course STAT 400 taught by Professor Tba during the Fall '05 term at University of Illinois at Urbana–Champaign.

Page1 / 4

stat400lec4 - Statistics 400 Lecture 4 Methods of...

This preview shows document pages 1 - 3. Sign up to view the full document.

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