The main weakness of our study was nonresponse bias. We had a list of 25 males and 25 females in our sample, but we only got 23 responses for each gender. Since our sample consisted of students in NOHS we can only extrapolate our data to all students in NOHS and not other high schools or people who aren't of high school age. Some suggestions for further work would be to time a study to be right after a new phone releases for each brand. That way you can see the initial preferences of members in your sample. Another suggestion would be to redo the study in 5-10 years because the market for phones might change, and consumer preferences for each brand might be different.