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
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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