An industrial sales manager, testing the effectiveness of three different sales presentations, randomly selected a presentation to be used when making the next sales call on 14 customers.
The numbers of units purchased as a result of each sales call are shown here. Use the 0.05 level in determining whether the three sales presentations could be equally effective.
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Presentation
|
|
1
|
2
|
3
|
|
7
|
13
|
14
|
|
9
|
10
|
15
|
|
11
|
11
|
12
|
|
7
|
13
|
10
|
|
|
14
|
13
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