Cereal Manufacturer The plant manager of a cereal manufacturer is wondering if the company could save some cereal by slightly lowering the cereal content of each box. Studying a major product, a 454 gram (net weight) ready-to eat cereal, the manager discovers that four boxes are routinely taken from the filling machine every 10 minutes and weighed. Data for approximately 2.5 hours of inspection are shown below. Questions 1. Is the process in control?

Sample	1	2	3	4	5	6	7	8	9	10	11	12	13	14	15
1	455.5	456	456	452.5	456	452	457.5	454.5	456	453	455	458	457.5	458	460
2	460	453	453	455	456	455	455.5	453	454	455	457.5	456	456.5	453	455.5
3	456.5	454	454	453	455	453	457	453	453	456	456.5	454.5	453	456.5	454.5
4	456.5	455	455	455	454.5	456	452	458	455	456	456.5	454	455.5	456	457