It sounds like you have a dilemma that I can help you fix.
Although this project sounds hard, it is very easy. Go on a trusted site, (i.e. stride.com) and you will find statistics, possibly more info about the gum.
Other places to look would be the Google search engine, which is very reliable, as well as Yahoo! Search.
You may even want to try going on Yahoo! Answers and asking this same question- I guarantee you will get more answers there than here :P.
As for the surveys, have ten of her friends try each gum out and record how long it takes, and how much they like the gum.
The project in and of itself is extremely simple. It's a matter of getting everything together and having your ideas straight.
If you have any other questions, feel free to PM me and I will further guide you along. Good luck to your daughter!
P.S. Good work, Colleen!
PM me if you have a question.