refers to the length of time we usually choose to cook something: an average of the range specified by a recipe. begs the question, why don't they just tell us to use the number in the middle in the first place?
How long did you put the food in for?
8 minutes. The box said 7 to 9 so I chose the microwave middle ground.
When are you gonna show up at the party?
It goes from 4 to midnight so I thought I'd go at 8, choose the microwave middle ground.