Chapter 6.11, Problem 12E

A broth used to manufacture a pharmaceutical product has its sugar content, in mg/mL, measured several times on each of three successive days.

Day 1:    5.0    4.8    5.1    5.1    4.8    5.1    4.8

4.8    5.0    5.2    4.9    4.9    5.0

Day 2:    5.8    4.7    4.7    4.9    5.1    4.9    5.4

5.3    5.3    4.8    5.7    5.1    5.7

Day 3:    6.3    4.7    5.1    5.9    5.1    5.9    4.7

6.0    5.3    4.9    5.7    5.3    5.6

1. a. Can you conclude that the variability of the process is greater on the second day than on the first day?
2. b. Can you conclude that the variability of the process is greater on the third day than on the second day?