Sample means and ranges were obtained for five samples of 10 units per sample from a production process.Assume the process was considered to be in control during the period these samples were collected.The results are as follows: 1 10.58 .23
2 9)97 .25
3 9)99 .21
4 10.23 .28
5 10.23 .28
What is the central line of the X chart for this process
A)10.00
B)10.05
C)10.20
D)9.45
E)9.75

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The Answer of Sample means and ranges were obtained for five samples of 10 units per sample from a production process.Assume the process was considered to be in control during the period these samples were collected.The results are as follows: 1 10.58 .23
2 9)97 .25
3 9)99 .21
4 10.23 .28
5 10.23 .28
What is the central line of the X chart for this process
A)10.00
B)10.05
C)10.20
D)9.45
E)9.75

Sample Means and Ranges Were Obtained for Five Samples of 10