Statistical Quality Control - SQC - Control Charts for Variables and Control Charts for Attributes - Mean Chart and Range Chart from Samples
Problem/Case:
Construct the Mean Chart for the following data of 12 samples (size 5) and state your conclusion:
Sample
1: 42, 65, 75, 78, 87
2: 42, 42, 68, 72, 90
3: 19, 24, 80, 81, 81
4: 36, 54, 69, 77, 84
5: 42, 51, 57, 59, 78
6: 51, 74, 75, 78, 132
7: 60, 60, 72, 95, 138
8: 18, 20, 27, 42, 60
9: 15, 30, 39, 62, 84
10: 69, 109, 113, 118, 153
11: 64, 90, 93, 109, 112
12: 61, 78, 94, 109, 136
for n = 5, take A2 = 0.577; D3 = 0 and D4 = 2.115 wherever applicable.
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