Question

A juice drink filling machine, when in perfect adjustment, fills the bottles with 12 ounces of drink on an average. Any overfilling or underfilling results in the shutdown and readjustment of the machine. To determine whether or not the machine is properly adjusted, the correct alternative hypotheses is

a. The average is greater than or equal to 12 ounces.
b. The average is not equal to 12 ounces.
c. The average is less than 12 ounces.
d. The average is equal to 12 ounces.

Answer 1

b. the average is not equal to 12 ounces.

Explanation:

a and is incorrect because being equal to 12 ounces is what we want.

c - we want to look for greater than 12 as well as less than.