To find the control limits for X-bar chart and R-chart.
Using the chart parameters developed above to define the control charts for future candy bar production,
a. Calculate the appropriate plotting points from the data below and plot them on your charts.
b. Comment as to the stability or instability of the candy production process based on your charts.
|
Sample Number
|
Candy Bar 1
|
Candy Bar 2
|
Sample Number
|
Candy Bar 1
|
Candy Bar 2
|
|
31
|
60.381
|
61.841
|
46
|
62.339
|
63.043
|
|
32
|
61.821
|
62.038
|
47
|
70.007
|
64.371
|
|
33
|
61.566
|
63.955
|
48
|
67.858
|
67.673
|
|
34
|
60.399
|
60.908
|
49
|
65.798
|
66.885
|
|
35
|
62.288
|
62.604
|
50
|
65.833
|
67.794
|
|
36
|
60.067
|
61.886
|
51
|
65.712
|
71.446
|
|
37
|
62.66
|
62.403
|
52
|
67.525
|
70.303
|
|
38
|
62.53
|
63.469
|
53
|
68.037
|
72.309
|
|
39
|
62.699
|
62.81
|
54
|
72.449
|
65.958
|
|
40
|
63.676
|
61.905
|
55
|
68.187
|
70.43
|
|
41
|
60.587
|
62.57
|
56
|
67.875
|
64.558
|
|
42
|
62.584
|
63.251
|
57
|
59.381
|
61.288
|
|
43
|
61.937
|
63.574
|
58
|
60.821
|
59.067
|
|
44
|
62.865
|
62.574
|
59
|
60.566
|
60.841
|
|
45
|
63.876
|
63.799
|
60
|
59.399
|
61.038
|