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A worker takes a random sample of 290 bolts and finds that 29 of them are either too long or too short, thus making them unusable. estimate the number of unusable bolts in a production of 20,000 bolts.
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A worker takes a random sample of 290 bolts and finds that 29 of them are either too long or too short, thus making them unusable. estimate the number of unusable bolts in a production of 20,000 bolts.

User Gabidavila
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2 Answers

3 votes

Answer:

2,000 (gradpoint)

Explanation:

User Aztack
by
7.7k points
4 votes
You set up a proportion for these types of approximations...

We will create a ratio of defective versus total...

29/290=1/10 so the estimate follows..

d/20000=1/10

d=2000

So we would estimate that about 2000 of the 20000 would be defective.
User VFragosop
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