A study of cell phone users found cell phones give people personal power, allow unprecedented mobility, and give people the ability to conduct their business on the go. Interesting enough, gender differences can be found in phone use. Women see their cell phone as a means of expression and social communication, whereas males tend to use it as an interactive toy.

According to the Pew Research Institute (www.

pewinternet.org), in 2015, 66% of women owned a cell phone.

a. State the appropriate null and alternative hypotheses for testing the Pew Research Institute claim.

b. Based on a random sample of women shown in the data file called Phone Survey, test the null hypothesis. (Use a = 0.05.)