Control Charts - Which statement is NOT true? x-bar Chart e 13 12 UCL E 10 LCL 2

Question

Control Charts - Which statement is NOT true?

x-bar Chart e 13 12 UCL E 10 LCL 2 Mon Tues Wed Thu Fri Sat Mon Tues Wed Thu Fri Sat Day n 5 13 12 Range Chart UCL Mon Tues Wed Thu Fri Sat Mon Tues Wed Thu Fri Sat Day Which statement is NOT true? Select one: a. This process is great, since the x-bar and Range charts are in control. O b. The Range chart should be plotted first. O c. The average part dimension is between 10 and 11. O d. The x-bar chart is meaningless unless the Range chart is in control

Explanation / Answer

here as we can see that friday sample data is below the lower control limit therefore

option A is correct

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