A production manager at a Contour Manufacturing plant has inspected the number of defective plastic molds in five random samples of 30 observations each. Following are the number of defective molds found in each sample:
Sample
Number of Defects
Number of Observations in Sample
1
2
30
2
0
30
3
1
30
4
0
30
5
2
30
Total
5
150
Construct a 3-sigma control chart () with this information.
(Round your answers to 2 decimal places, the tolerance is +/-0.01)
CL =
UCL =
LCL
2) Ten samples with five observations each have been taken from the Beautiful Shampoo Company plant in order to test for volume dispersion in the shampoo bottle-filling process. The average sample range was found to be 0.32 ounces. Develop control limits for the sample range.
(Round your answers to 3 decimal places, the tolerance is +/-0.001)
CL =
UCL =
LCL =
Solution Contains, calculations + farmula’s used + Excel sheet + chart
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