Chapter 4 Homework
Exercise 4.2: Use the data from Exercise 3.3. Compute a 99% confidence interval for the
difference in response between the average of the three treatment groups (acid, pulp, and sal
1. Compare true average in the group, use paired T-test. Minitab-stat-paired t.
Check the normality first, if it is normal we can do the following up procedures.
2. Find the one side randomization p-v
Exercise 5.1
We have five groups and three observations per group. The group means are 6.5, 4.5, 5.7, 5.6,
and 5.1, and the mean square for error is .75. Compute simultaneous confidence intervals (95%
A First Course in
Design and Analysis
of Experiments
A First Course in
Design and Analysis
of Experiments
Gary W. Oehlert
University of Minnesota
Cover design by Victoria Tomaselli
Cover illustration