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One way Analysis Of Variance in Excel.

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 at random selected from each repair shop and their waiting times in days are recorded. The output from the statistical software package is:

 

Summary

Groups

Count

Sum

Average

Variance

Body Shop A

3

15.4

5.133333

0.323333

Body Shop B

4

32

8

1.433333

Body Shop C

5

25.2

5.04

0.748

Body Shop 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

Within Groups

9.726167

12

0.810514

 

 

Total

33.09938

15

 

 

 

Is there evidence to suggest a difference in mean waiting times at the four body shops? Utilize the .05 significance level.

Statistics and Probability, Statistics

  • Category:- Statistics and Probability
  • Reference No.:- M921087

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