In class, we were given 1 balloon, 2 corks, 1 rubber band, 2 paper clips, 2 coffee stir sticks, 2 straws, 2 pipe cleaners, and a sheet of foil to create something that would fling a cotton ball as far as possible. My partner Sonia and I created something using foil, straws, pipe cleaners, and a rubber band. To launch, we pulled the foil one way and the rubber band the other to give it more power. Unfortunately, we released the cotton ball wrong during the official trial and ended up with a negative distance of -0.75 inches.
However when we tested our machine on our own, we got:
49.5 inches, 29 inches, 12.5 inches, 22 inches, 15.5 inches, 0 inches, 3.5 inches, 8.5 inches, 0 inches, and 9 inches.
mean:14.95 inches
median: 10.75 inches
range: 49.5 inches
sample standard deviation: 15.28833424209
From this information, we can predict that the ball will land between about -0.33 inches and 30.23 inches.
Statistical analysis results would be better for measuring performance when comparing devices than a single attempt, simply because accidents do happen. For example, you cannot judge someones basketball ability based on one shot. For this reason, grades for this project should be given by the average rather than the one official shot.
If I were to do this again, I would use the coffee stir sticks instead of the straws and pipe cleaners because they are stronger and would provide more energy. This would only use a few materials.
As a team, Sonia and I worked very well together. We each contributed ideas and listened to each others.