When the objective is to compare more than two populations, the ...

[OSWALD]

When the objective is to compare more than two populations, the experimental design that is the counterpart of the matched pairs experiment is called a:
 a. completely randomized design.
  b. one-way ANOVA design.
  c. randomized block design.
  d. None of these choices.

Question 2

Assume a process has limits set at 2.5 standard errors from the centerline. The average run length (ARL) is 81 . What does this mean?

[shewald78]

Answer to Question 1

C

Answer to Question 2

When the process is under control, the x chart will erroneously conclude that it is out of control once every 81 samples on average. If the sampling plan, for example, calls for samples to be taken every hour, on average there will be a false alarm once every 81 hours.