# 420Hw04 - STAT 420 Homework#4(10 points(due Friday...

This preview shows pages 1–2. Sign up to view the full content.

Fall 2008 Homework #4 (10 points) (due Friday, September 26, by 3:00 p.m.) 1. Hogg and Ledolter report on an engineer in a textile mill who studies the effects of temperature and time in a process involving dye on the brightness of a synthetic fabric ( brightness is measured on a 50-point scale ). Three observations were taken at each combination of temperature and time. Temperature Time (cycles) 350 ° F 375 ° F 400 ° F 40 38, 32, 30 37, 35, 40 36, 39, 43 50 40, 45, 36 39, 42, 46 39, 48, 47 Construct the ANOVA table and conduct tests for the interaction first and then, if appropriate, the main effects. Use α = 0.05 for each test. [ R. V. Hogg and J. Ledolter, Applied Statistics for Engineers and Physical Scientists , 2nd ed. ( New York: Macmillan, 1992 ). ] 2. The upper management at Initech wants to examine the relationship between the number of years on the job ( x ) and the number of TPS reports produced ( y ) for the middle-management employees. The data are as follows: x y 1 7 2 4 3 13 3 10 4 10

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 05/09/2010 for the course MATH 420 taught by Professor Stepanov during the Spring '10 term at University of Illinois, Urbana Champaign.

### Page1 / 3

420Hw04 - STAT 420 Homework#4(10 points(due Friday...

This preview shows document pages 1 - 2. Sign up to view the full document.

View Full Document
Ask a homework question - tutors are online