Suggesting difference in the mean waiting times

Reference no: EM1317326

There are four auto body shops in a community and all claim to promptly serve customers. To check if there is any difference in service, customers are randomly selected from each repair shop and their waiting times in days are recorded. The output from a statistical software package is:

Summary:

Groups	Count	Sum	Average	Variance
Body Shop A	3	15.4	5.1333	0.32333
Body Shop B	4	32	8	1.43333
Body Shop C	5	25	5.04	0.748
Body Shop D	4	25.9	6.475	0.59583

ANOVA:

Source of Variation	SS	Df	MS	F	p-value
Between Groups	23.37321	3	7.791069	9.612506	0.001631
Within Groups	9.726167	12	0.819514
Total	44.09938	15

Is there evidence to suggest a difference in the mean waiting times at the four body shops?

Use the .05 significance level.

Reference no: EM1317326

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