Statistics - ANOVA Projects

An evaluation of a new coating applied to 3 different materials was conducted at 3 different laboratories

Problem 4: An evaluation of a new coating applied to 3 different materials was conducted at 3 different laboratories located in Atlanta, Charlotte, and Jacksonville. Each laboratory tested 5 samples from each of the treated materials including: SAE 1010, AISI 413, and Stainless 304. The tests results represent the time to oxidation (in hours) when exposed to a salt spray. Results are given in the table above. Run the appropriate statistical procedures and analyze, and explain the results. Prepare a statement of recommendation to the president of PLASMA-COAT, Inc.

	Materials
Labs	SS304	SAE1010	AISI4130
ATL	4.1	3.1	3.5
	3.9	2.8	3.2
	4.3	3.3	3.6
	4.2	2.9	3.5
	4	3	3.4
CHT	2.7	1.9	2.7
	3.1	1.8	2.3
	2.6	2.2	2.5
	2.8	2	2.5
	2.9	2.3	2.4
JAX	3.2	1.9	3.2
	3.4	2.2	3.1
	3.1	2.3	3.4
	3.2	2.2	3.2
	3.3	2.3	3.5

Problem 5: Manufacturing engineering is interested in obtaining optimum strength for forging of crankshafts. Tests were conducted on the factors considered the most critical for the process. Results of preliminary productions runs are shown above. Conduct the appropriate analysis and write a brief summary of your findings.

		Strength in KSI
Machine Setting	50 Ton	143	141	150	146	143
Machine Setting	60 Ton	152	149	137	143	138
Temperature	1500	134	133	132	127	130
Temperature	1600	129	127	132	129	129
Quench	Sulphur Oil Bath	147	148	144	142	146
Quench	Mineral Oil Spray	142	137	140	139	141