pm2 - Statistics 103 Winter 2008 Practice Midterm 2...

Info iconThis preview shows page 1. Sign up to view the full content.

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

Unformatted text preview: Statistics 103 Winter 2008 Practice Midterm 2 Students whose last names start with A-H should go to 6 Wellman Hall. You can bring 1 page of handwritten notes. Please bring calculators, pens/pencils and bluebook(available at bookstore). Please write your name, student ID and section no. PROBLEM 1 Indicate (with a short argument whenever possible) whether the following state- ments are TRUE or FALSE : (a) In order to compare two unbiased estimators of the population mean one can use the mean squared error as a criterion. (b) Central limit theorem tells us that if a certain number of random variables have the same mean and variance then their average has a normal distribution. PROBLEM 2 Suppose X has a marginal distribution p X (1) = 0 . 3 ,p X (2) = 0 . 4 and p X (3) = 0 . 3 and Y has a marginal distribution p Y (0) = 0 . 3 and p Y (1) = 0 . 7. Assume that X and Y are independent. (a) Find the joint distribution p X,Y ( x,y )....
View Full Document

This note was uploaded on 05/18/2008 for the course STATS 103 taught by Professor Sen during the Winter '08 term at UC Davis.

Ask a homework question - tutors are online