Answer: d. H0:μ=12 ; Ha:μ not equal to 12
Step-by-step explanation:
Let denotes the average ounces of soft drink in a bottle.
Given : a soft drink filling machine, when in perfect adjustment, fills the bottles with 12 ounces of soft drink
i.e. ...(i)
Any overfilling or under-filling results in the shutdown and readjustment of the machine or we can say ...(ii)
As we know , Null hypothesis believes that there is no statistical difference in between the groups being tested.
Whereas Alternative hypothesis believes that there is statistical difference .
So , from (i) and (ii) , we have
Hence, the correct option is d. H0:μ=12 ;Ha:μ not equal to 12.