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A quality-conscious disk manufacturer wishes to know the fraction of disks his company makes which are defective. Step 1 of 2: Suppose a sample of 2346 floppy disks is drawn. Of these disks, 1971 were not defective. Using the data, estimate the proportion of disks which are defective. Enter your answer as a fraction or a decimal number rounded to three decimal places.

User Pajics
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1 Answer

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22 votes

Answer:

The proportion of disks which are defective is 0.16.

Explanation:

The proportion of defective disks is the number of defective disks in the sample divided by the size of the sample.

In this question:

2346 disks.

1971 not defective, so 2346 - 1971 = 375 defective.


p = (375)/(2346) = 0.16

The proportion of disks which are defective is 0.16.

User Scott Jacobsen
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