Question

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 1875 floppy disks is drawn. Of these disks, 281 were 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

Answer 1

Solution:

Here, we have to find the estimate for the proportion of defective items or disks.

We are given

Sample size = n = 1875

Number of defective items = x = 281

Proportion of defective items = x/n = 281/1875 = 0.149867

Answer: 0.150