Question: While the process was operating in control, 20 samples of size n = 4 were taken from a process, which fills large tubes of toothpaste. The average of the sample means was 254.50 grams, and the average of the sample ranges was 8.45 grams.

1. Calculate 3 \(\sigma \) control limits for mean and range charts to monitor this process.
2. Calculate the mean and range for each sample.
3. Draw the mean and range charts for this process. Plot the results of the five samples on the chart.
4. Does the process appear to be in control?

Price: $2.99

Solution: The downloadable solution consists of 3 pages
Deliverable: Word Document