The proportion of defective disks in the sample is 172/1434 = 0.120.
So, the estimated fraction of disks which are defective is 0.120 or approximately 0.120.
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 1434
floppy disks is drawn. Of these disks, 172
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.
1 answer