You have to list the means of production budget and worldwide gross per language. But for some reason, the language of some movies, including Star Wars, is set on None or 'None'. Should I include them in my list or not? Thanks in advance!
That is a very good question, Christian! You can regard all movies for which the language is unknown (i.e. "None"/None) as a single category (even though the mean budget and mean gross indeed have little value).