econ41class9_practice_problems

# Econ41class9_practic - Econ 41 Ekaterini Kyriazidou UCLA Statistics for Economists Class 9 Practice Problems On Independent and Mutually Exclusive

This preview shows pages 1–4. Sign up to view the full content.

Econ 41 Ekaterini Kyriazidou UCLA Statistics for Economists Class 9: Practice Problems

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

View Full Document
On Independent and Mutually Exclusive events (Problem 14, Page 183) There are 200 graduate students, out of which 110 female and 125 out-of-state. Of the 110 female students 70 are out-of-state. If one student is selected at random what is the probability that the student is a male? P ( male )=1 P ( female )=1 110 / 200 . If one student is selected at random what is the probability that the student is out-of-state given that it’s a female? P ( out-of-state | female )=70 / 110 . Are the events "female" and "out-of-state" independent? P ( out-of-state ) = 125 / 200 6 = P ( out-of-state | female )=70 / 110 . Not independent. Are they mutually exclusive? No, they can occur together.
(Problem 19, Page 183) The probability that a randomly selected student from a college is female is .55 and that a student works for more than 10 hours per week is .62. If these two events are independent, f nd the probability that a randomly selected student is Ma leandwo rksfo rmo rethat10hoursperweek . By independence, P ( MandW )= P ( M ) · P (

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

View Full Document
This is the end of the preview. Sign up to access the rest of the document.

## This note was uploaded on 03/10/2008 for the course ECON 41 taught by Professor Guggenberger during the Spring '07 term at UCLA.

### Page1 / 13

Econ41class9_practic - Econ 41 Ekaterini Kyriazidou UCLA Statistics for Economists Class 9 Practice Problems On Independent and Mutually Exclusive

This preview shows document pages 1 - 4. Sign up to view the full document.

View Full Document
Ask a homework question - tutors are online