According to a Pew Research Center study, in May 2011, 40% of all American adults had a smart phone (one which the user can use
to read email and surf the Internet). A communications professor at a university believes this percentage is higher among community college students. She selects 341 community college students at random and finds that 147 of them have a smart phone. Then in testing the hypotheses:H0: p = 0.4 versusHa: p > 0.4,what is the test statistic?z =________________. (Please round your answer to two decimal places.)
