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An chart is being developed using 25 samples of size 8 each. The average of 25...

An chart is being developed using 25 samples of size 8 each. The average of 25 sample means is 6.20. The average of the 25 ranges is 0.30. The lower control limit is __________.

Select one:

A. 5.827

B. 5.900

C. 5.960

D. 6.088

math   Statistics-And-Probability   
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