Author Question: The primary interest of designing a randomized block experiment is to: a. reduce the ... (Read 50 times)

melly21297 · **on:** Jun 24, 2018

The primary interest of designing a randomized block experiment is to:
a. reduce the within-treatments variation to more easily detect differences among the treatment means.
b. increase the between-treatments variation to more easily detect differences among the treatment means.
c. reduce the variation among blocks.
d. None of these choices.

Question 2

A production facility produces 75 units per hour and uses an x chart to monitor its quality. The control limits are seat at 2.5 standard errors from the mean. On average, how many units will be produced until the control chart signals that the process is out of control, when it is in fact under control?

nixon_s · **Reply #1 on:** Jun 24, 2018

Answer to Question 1

A

Answer to Question 2

Since P = P ( z > 2.5) = .0124, then ARL = 1/P = 1/.024 81 samples should be taken.
Number of units = 75 units per sample 81 samples = 6,075 units.