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Scrat [10]
3 years ago
6

I don't understand this question. Please help!

Mathematics
1 answer:
Marianna [84]3 years ago
3 0
The answer is A and B
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Each of 165 newly manufactured items is examined and the number of scratches per item is recorded (the items are supposed to be
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Step-by-step explanation:

Given that each of 165 newly manufactured items is examined and the number of scratches per item is recorded (the items are supposed to be free of scratches), yielding the following data

x freq x*f x^2*f

   

0 25 0 0

1 34 34 34

2 37 74 148

3 29 87 261

4 19 76 304

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6 8 48 288

7 5 35 245

   

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Variance 3.267731864  

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