5. An electronics company wants to comparethe quality of their cell phones to th
ID: 2915427 • Letter: 5
Question
5. An electronics company wants to comparethe quality of their cell phones to the cell phones from threecompetitors. They sample 10 phones from each company and count thenumber of defects for each phone. If ANOVA were used to compare theaverage number of defects, the treatments would be defined as:
the number of cell phones sampled.
the average number of defects.
The total number of phones
The four companies.
6. A manufacturer of automobile transmissionsuses three different processes. The management ordered a study ofthe production costs to see if there is a difference among thethree processes. A summary of the findings is shown below.
Process 1 Process 2 Process 3 Total
ProcessTotals($100’s) 137 108 107 352
SampleSize 10 10 10 30
Sum ofSquares 1893 1188 1175 4256
What is the critical value of F at the 5% level ofsignificance?
19.45
3.00
3.35
3.39
7. A manufacturer of automobile transmissionsuses three different processes. The management ordered a study ofthe production costs to see if there is a difference among thethree processes. A summary of the findings is shown below.
Process 1 Process 2 Process 3 Total
ProcessTotals($100’s) 137 108 107 352
SampleSize 10 10 10 30
Explanation / Answer
2) False 3) False 5) The four companies.6) F - critical value at 5% level with (2,27) DF = 3.35 7) 2
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