Question 2 - Statistical Process Control

The operations team at ABC Motor Company feel that the executive management team ignores the company's science related to emission technology, which has contributed to several of the quality issues experienced. In your own words, write a section of the business report that provides a concise answer for each of the following questions that both the executive and operations team will read.

ABC Motor Company installs approximately 10 engines per hour. The process manager measures the maximum Nitrous Oxide (NOx) emissions of each engine to be installed. As part of the process, a subgroup of n=8 measurements is randomly taken each time the engine is tested. This occurs during a 6-minute test on every engine. There was an issue with testing during sample 5 that is under investigation.

The results of the analyses are given in Table Q1.

Sample	Engine Emissions Output (g/min)
1	4.93	4.72	5.01	4.82	4.95	4.83	4.88	4.81
2	4.77	4.85	4.67	4.84	4.69	4.92	4.79	4.73
3	4.99	4.66	4.87	4.70	4.98	4.79	4.83	4.81
4	4.67	5.02	4.73	4.90	4.75	5.05	4.85	4.69
5	4.88	6.83	6.98	6.78	6.87	6.82	4.86	6.83
6	4.70	4.97	4.77	4.89	4.74	4.96	4.84	4.83
7	4.97	4.74	5.05	4.67	4.97	4.74	4.86	4.88
8	4.69	5.02	4.75	5.00	4.66	4.88	4.83	4.91
9	4.86	4.82	4.95	4.68	4.90	4.73	4.82	4.79
10	4.66	4.98	4.81	4.86	4.73	5.06	4.85	4.88

Table Q1 - Engine emissions of NOx (g/min)

a) Calculate the upper and lower control limits of an