Difference in the average processing times

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A large insurance company wants to determine whether there is a difference in the average time to process claim forms among its four different processing facilities. The data in Table represent weekly average number of days to process a form over a period of 4 weeks.

Table

 

Facility 1

Facility 2

Facility 3

Facility 4

1.50

2.25

1.30

2.0

0.9

1.85

2.75

1.5

1.12

1.45

2.15

2.85

1.95

2.15

1.55

1.15

(a) Test whether there is a difference in the average processing times at the 0.05 level.

(b) Test whether there is a difference, using Tukey's method to ?nd which facilities are different.

(c) Interpret your results and state any assumptions you have made in solving the problem.

Reference no: EM13966291

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