# A sample of five units is taken from a process

A sample of five units is taken from a process every half hour. It is known that the process standard deviation is in control with Ïƒ = 2.0. The x values for the last 20 samples are shown in Table 10E.7. Specifications on the product are 40 ± 8. (a) Set up a modified control chart on this process. Use three-sigma limits on the chart and assume that the largest fraction nonconforming that is tolerable is 0.1%
3-sigma limits:
(b) Reconstruct the chart in part (a) using two-sigma limits. Is there any difference in the analysis of the data?
(c) Suppose that if the true process fraction nonconforming is 5%, we would like to detect this condition with probability 0.95. Construct the corresponding acceptance control chart.

Members

• Access to 2 Million+ Textbook solutions
• Ask any question from 24/7 available
Tutors
\$9.99

OR

Non-Members

Get help from Statistics Tutors
Ask questions directly from Qualified Online Statistics Tutors .
Best for online homework assistance.