TABLE 12-16
A filling machine at a local soft drinks company is calibrated to fill the cans at a mean amount of 12 fluid ounces and a standard deviation of 0.5 ounces. The company wants to test whether the standard deviation of the amount filled by the machine is 0.5 ounces. A random sample of 15 cans filled by the machine reveals a standard deviation of 0.67 ounces.
-Referring to Table 12-16, what type of test should be performed?
A) Lower-tail test
B) Upper-tail test
C) Two-tail test
D) None of the above

Question

Quizplus · Accepted Answer

A two-tail test should be performed because the alternative hypothesis is that the standard deviation is not equal to 0.5 ounces.

TABLE 12-16 A Filling Machine at a Local Soft Drinks Company Is