A manager wants to build 3-sigma x-bar control limits for a process. The target value for the mean of the process is 10 units, and the standard deviation of the process is 3. If samples of size 9 are to be taken, what will be the upper and lower control limits, respectively?
4 and 16
7 and 13
13 and 7
16 and 4
19 and 1
Answer: 13 and 7
Explanation:
| no. of samples each day, n= | 9 | ||
| z= | 3 | ||
| Standard deviation(sigma) | 3.00 | ||
| control limits for X bar, | |||
| CL or Xbarbar | 10.00 | ||
| UCL=Xbarbar+ z*(sigma/sqrt(n)) | 13.00 | ||
| LCL=Xbarbar- z*(sigma/sqrt(n)) | 7.00 |
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A manager wants to build 3-sigma x-bar control limits for a process. The target value for the...