A study of college student cell phone use found usage to be broken down as text messaging 82%, phone calls 10%, and Internet surfing 8%. A dorm director asks students to log their use for one day. On average, the students used their phones 65 times that day, broken down as 43 text messages, 14 phone calls, and 8 Internet surfs. Is this dorm's residents' usage significantly different from what the prior study had indicated?
a. Create a table of observed and expected frequencies.
b. Calculate %2.
c. At what level of confidence can you reject the null hypothesis?