Testing hypotheses by the excel

Reference no: EM13111940

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 out put from a statistical software package is

Summary

Groups Count Sum Average Variance

Group A 3 15.4 5.133333 0.323333

Group B 4 32 8 1.433333

Group C 5 25.2 5.04 0.748

Group D 4 25.9 6.475 0.595833

ANOVA

Source of variation SS DF MS F P-value

Between groups 23.37321 3 7.791069 9.612506 0.001632

With in groups 9.726167 12 0.810514

Total 33.09938 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: EM13111940

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