The fill size for a small bag of peanuts distributed by a popular airline is 50 grams. The producer wishes to set up a set of control charts for this process and collects the data shown in the table
What are the upper and lower control limits of their X-bar chart?
Sample Item #1 Item #2 Item #3 Item #4 Sum
1 54.5 54.3 53.8 50.4 213.0
2 50.6 53.5 53.2 54.9 212.3
3 51.1 54.3 50.4 50.7 206.6
4 52.7 52.1 51.3 51.0 207.2
5 51.7 51.2 54.7 54.3 211.8
6 51.1 51.5 54.7 50.4 207.7
7 54.0 52.3 54.7 51.4 212.4
8 53.2 50.4 53.4 51.4 208.4
9 51.9 50.2 50.2 52.9 205.1
A) 54.84, 49.85
B) 54.41, 50.32
C) 53.87, 50.78
D) 53.51, 51.18
Answer: A
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