SCENARIO 12-20
a Filling Machine at a Local Soft Drinks $\chi$

SCENARIO 12-20
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 Scenario 12-20,which is the appropriate test to use?

A) $\chi$ ² -test of independence
B) Kruskal-Wallis rank test
C) Wilcoxon rank sum test
D) $\chi$ ² -test of population variance