Answer:
“The average is 24 ounces”
Step-by-step explanation:
The null hypothesis is always a statement that is already established and we consider true, until it emerges a situation that makes us doubt about the truthfulness of that established fact.
The null is very often an average or mean, but not necessarily.
In this case, as the established fact is that the boxes are filled with an average weight of 24 ounces, the null hypothesis is “The average is 24 ounces”