Students were invited to watch a newly released movie shortly after lunch. Half the students were given a medium-sized bucket of popcorn and the other half a large-sized bucket. The popcorn was not fresh. In fact, it was five days old and very stale. Both sizes of containers were large enough so that none of the students could finish. At the end of the movie the buckets were weighed and the results recorded. Do these data allow researchers to conclude that the larger the bucket the more people will eat?