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Leokris [45]
3 years ago
11

A group of screwdrivers produced in a day at a particular factory has a defect rate of 0.7%. Suppose a quality inspector randoml

y inspects 500 screwdrivers. Complete the following statement: The quality inspector should expect ____defective screwdrivers, with an error of ____. Group of answer choices
Mathematics
1 answer:
dangina [55]3 years ago
3 0

Answer: 3.5;0.4%

Step-by-step explanation:

The number of defective screwdrivers that the quality inspector should expect would be calculated as:

= np

= 0.7% × 500

= 0.7/100 × 500

= 0.007 × 500

= 3.5

.

The error will be calculated as:

= √p(1-p)/n

= ✓0.007(1 - 0.007)/500

= 0.004

= 0.4%

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