Chapter 27, Problem 27.29E

(a)

To determine

To construct: The graph that compares the mean emission rates for the four groups and to check whether the emissions increase when the plant is attacked or not.

(b)

To determine

To state: The hypotheses does ANOVA test in this setting.

(c)

To determine

To check: Whether the conditions for ANOVA are clearly satisfied or not.

(d)

To determine

To find: The relationship between the standard error of the mean and the standard deviation for a sample.

To find: The four sample standard deviations.

To check: The standard deviations satisfy the rule of thumb for safe use of ANOVA.