Nocaf Drinks , Inc. a producer of decaffeinated coffee, bottles Nocaf. Each bottle should have a net  weight of 4 ounces. The machine that fills the bottles with coffee is new, and the operations manager  wants to make sure that it is properly adjusted. The manufacturer of the machine has stated that the  process average should be 4.05 ounces and that the average range should be 0.31 when the machine is  properly adjusted. The operations manager take a sample of 8 bottles and records the average and range  in ounces for each sample. The data for the first eight samples is in the following table : Sample number Sample Range Sample Average 1 0.41 4.00 2 0.55 4.16 3 0.44 3.99 4 0.48 4.00 5 0.56 4.17 6 0.62 3.93 7 0.54 3.98 8 0.44 4.01 Develop the mean and range control charts. Is the machine properly adjusted and in control ?. State your  reasons

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Nocaf Drinks , Inc. a producer of decaffeinated coffee, bottles Nocaf. Each bottle should have a net 
weight of 4 ounces. The machine that fills the bottles with coffee is new, and the operations manager 
wants to make sure that it is properly adjusted. The manufacturer of the machine has stated that the 
process average should be 4.05 ounces and that the average range should be 0.31 when the machine is 
properly adjusted. The operations manager take a sample of 8 bottles and records the average and range 
in ounces for each sample. The data for the first eight samples is in the following table :
Sample number Sample Range Sample Average
1 0.41 4.00
2 0.55 4.16
3 0.44 3.99
4 0.48 4.00
5 0.56 4.17
6 0.62 3.93
7 0.54 3.98
8 0.44 4.01
Develop the mean and range control charts. Is the machine properly adjusted and in control ?. State your 
reasons

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