What are the control chart upper and lower control limits for an alpha risk of .05?
A).0272 and .0128
B).0287 and .0113
C).029 and .013
D).0303 and .0097
E).0332 and .0068

Question

Quizplus · Accepted Answer

The control chart upper and lower control limits for an alpha risk of .05 are calculated using statistical formulas, and the answer is dependent on the sample size and standard deviation. The most common control chart is the X-bar chart, and for this chart with a sample size of 25, the upper and lower control limits are 0.0287 and 0.0113, respectively. Therefore, the correct answer is B.

What Are the Control Chart Upper and Lower Control Limits