Question

Hour Xbar   R   Hour   Xbar   R   Hour   Xbar R Hour    Xbar R
1   3.35   0.76 7    2.95   0.53   13    3.11   0.80   19   3.41    1.66
2   3.00    1.23 8    2.75    1.13 14    2.73 1.36   20   2.89   1.04
3   3.22    1.38 9    3.12    0.66   15 3.12 1.11   21   2.65   1.08
4   3.39    1.21    10    2.75   1.28    16 2.74 0.50   22   3.38   0.46
5   3.17    1.12    11    2.93   1.22    17    2.86 1.43   23   3.04   1.63
6   2.96   0.32   12   2.97   0.35   18   2.64   1.24   24   2.54   1.02

Sampling 44 pieces of​ precision-cut wire​ (to be used in computer​ assembly) every hour for the past 24 hours has produced the following​ result

Based on the sampling​ done,

the

control limits for ​3-sigma

x overbarx

chart are ​(round all intermediate calculations to three decimal places before proceeding with further

​calculations)​:

Upper Control Limit

​(UCL Subscript x overbarUCLx​)

​=

nothing

inches ​(round your response to three decimal​ places).

Based on the sampling​ done,

the

control limits for ​3-sigma

x overbarx

chart are ​(round all intermediate calculations to three decimal places before proceeding with further

​calculations)​:

Upper Control Limit (UCL Subscript x overbarUCLx​) = inches ​(round your response to three decimal​ places).

Lower Control Limit ?

Answer 1