Question

. The table shows the costs per mile (in cents) for a sample of automobiles. At α = 0.01, can you conclude that at least one mean cost per mile is different from the others?

Small Sedan	Medium Sedan	Large Sedan	SUV 4WD	Minivan
41	65	60	79	64
39	47	69	58	74
47	61	79	67	57
52	57	71	70	49
44	62	76		68
	50	68

Answer 1

SUMMARY
Groups	Count	Sum	Average	Variance
Small Sedan	5	223	44.6	26.3
Medium Sedan	6	342	57	50.8
Large Sedan	6	423	70.5	44.3
SUV 4WD	4	274	68.5	75
Minivan	5	312	62.4	94.3

ANOVA
Source of Variation	SS	df	MS	F	P-value	F crit
Between Groups	2211.56	4.00	552.89	9.82	0.00	4.37
Within Groups	1182.90	21.00	56.33
Total	3394.46	25.00

Decision: P value <α , reject Ho  

Atleast one of the means is different..

THANKS

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