Setting the upper and lower control limits in a control chart closer to the center line results in a
A) lower probability of a Type I error.
B) lower probability of a Type II error.
C) lower probability of both a Type I and Type II error.
D) higher probability of both a Type I and Type II error.

Question

Setting the upper and lower control limits in a control chart closer to the center line results in a​
A) ​lower probability of a Type I error.
B) ​lower probability of a Type II error.
C) ​lower probability of both a Type I and Type II error.
D) ​higher probability of both a Type I and Type II error.

Quizplus · Accepted Answer

Setting the upper and lower control limits closer to the center line in a control chart increases the sensitivity of the chart, leading to a higher probability of detecting a false signal (Type I error) where none exists.

Setting the Upper and Lower Control Limits in a Control