SCENARIO 12-21
a Filling Machine at a Local Soft Drinks $\chi ^ { 2 }$

SCENARIO 12-21
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 12-21, 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