# Find the value of the linear correlation coefficient r.

A supplier of 3.5" disks clams that only 1% of the disks are defective. In a random sample of 600 disks, it is found that 3% are defective, but the supplier claims that this is simply a sample fluctuation. At the 0.01 level of significance, test the supplier's claim that 1% are defective.

True or false: There is not sufficient evidence to warrant rejection of the claim that 1% are defective.

True

False

Find the value of the linear correlation coefficient r.

The paired data consist of the costs of advertising (in thousands of dollars) and the number of products sold (in thousands):

Cost 9 2 3 4 2 5 9 10

Number 85 52 55 68 67 86 83 73

-0.071

0.708

0.246

0.235

https://brainmass.com/statistics/hypothesis-testing/find-the-value-of-the-linear-correlation-coefficient-r-134287

#### Solution Preview

A supplier of 3.5" disks clams that only 1% of the disks are defective. In a random sample of 600 disks, it is found that 3% are defective, but the supplier claims that this is simply a sample fluctuation. At the 0.01 level of significance, test the ...

#### Solution Summary

The solution finds the value of the linear correlation coefficient r.