Anderset Labs produces rough lenses that will ultimately be rounded into precision lenses for use in lab equipment. The company developed the following thickness measures, based on 15 samples of size 10 that were taken when the processes were under control
|
Mean
|
Minimum
|
Maximum
|
|
3.9
|
3.617
|
3.989
|
|
4.206
|
3.971
|
4.302
|
|
4.214
|
4.062
|
4.4
|
|
3.89
|
3.749
|
3.937
|
|
4.036
|
3.501
|
4.084
|
|
4.134
|
3.543
|
4.584
|
|
3.037
|
2.935
|
3.929
|
|
5.082
|
3.797
|
5.695
|
|
3.404
|
2.837
|
4.255
|
|
5.246
|
5.106
|
6.382
|
|
4.197
|
4.085
|
4.239
|
|
4.312
|
3.949
|
4.356
|
|
4.302
|
3.989
|
4.4
|
|
3.867
|
3.617
|
3.9
|
|
4.17
|
4.046
|
4.206
|
Use the data above to calculate X and R, and create the appropriate control charts.