A new machine has just been installed to cut & rough-shape large slugs.
The slugs are then transferred to a precision grinder. One of the
critical measurements is the outside diameter. The quality control
inspector randomly selected five slugs each hour, measured the outside
diameter, and recorded the results. The measurements (in millimeters)
for the period 8:00 a.m. to 10:30 a.m.
Outside Diameter (millimeters)
Time 1 2 3 4 5
8:00 87.1 87.3 87.9 87.0 87.0
8:30 86.9 88.5 87.6 87.5 87.4
9:00 87.5 88.4 86.9 87.6 88.2
9:30 86.0 88.0 87.2 87.6 87.1
10:00 87.1 87.1 87.1 87.1 87.1
10:30 88.0 86.2 87.4 87.3 87.8
Determine the control limits for the mean and the range.
Plot the control limits for the mean outside diameter and the range.
Are there any points on the mean or the range chart that are out of
control? Comment on the chart.
Statistics Homework Solutions
#6220
Statistical Techniques in Business & Economics
Statistical math problem mean and range.
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