1. We are comparing four potential suppliers for a type of fabric. The primary variable of interest is basis weight (in g., and higher basis weights are preferred).
Test at the 0.05 level to determine if there are any differences in mean basis weights, and if so, which means differ.
Griffin	Klein	Shelgrove	West		1. hypotheses	Ho: 1 = 2 = ... = t		2. test statistic	13.45180584
17.1	17.3	16.6	17.4			H1: at least one j is not equal		3. p-value	4.81617E-06
19.3	19.5	17.1	17.7					4. decision
18.5	18.4	16.9	17.9					5. conclusion
17.9	19.4	17.3	16.9
18.8	19.2	17.6	18.1
18.2	18.7	17.4	18.2		Anova: Single Factor
17.7	19.7	16.8	17.6
19	18.2	17.5	17.5		SUMMARY
18.6	18.1	17.2	16.8		Groups	Count	Sum	Average	Variance
19.1	17.8	17	17.9		Griffin	10	184.2	18.42	0.481777778
					Klein	10	186.3	18.63	0.644555556
					Shelgrove	10	171.4	17.14	0.102666667
					West	10	176	17.6	0.22
					ANOVA
					Source of Variation	SS	df	MS	F	P-value	F crit
					Between Groups	14.61875	3	4.872916667	13.45180584	4.82E-06	2.866266
					Within Groups	13.041	36	0.36225
					Total	27.65975	39