According to a Pew Research Center study, in May 2011, 31% 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 352 community college students at random and finds that 129 of them have a smart phone. In testing the hypotheses:
H0: p = 0.31 versus
Ha: p > 0.31,
she calculates the test statistic as z = 2.2911.
Then the p‑value = .
(Please round your answer to four decimal places.)
solution
z = 2.2911
P(Z>2.2911)=1 - P(Z<2.2911) = 1 -0.9890=0.0110 (using z table)
p-value=0.0110
According to a Pew Research Center study, in May 2011, 31% of all American adults had...
According to a Pew Research Center study, in May 2011, 31% 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 352 community college students at random and finds that 129 of them have a smart phone. In testing the hypotheses: H0: p = 0.31 versus Ha: p > 0.31, she calculates...
According to a Pew Research Center study, in May 2011, 31% 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 352 community college students at random and finds that 129 of them have a smart phone. In testing the hypotheses: H0: p = 0.31 versus Ha: p > 0.31, she calculates...
According to a Pew Research Center study, in May 2011, 31% 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 352 community college students at random and finds that 129 of them have a smart phone. In testing the hypotheses: H 0 : p = 0.31 versus H a : p...
According to a Pew Research Center study, in May 2011, 31% 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 352 community college students at random and finds that 129 of them have a smart phone. In testing the hypotheses: H 0 : p = 0.31 versus H a : p...
According to a Pew Research Center study, in May 2011, 33% of all American Type nun adults had a smart phone (one which the user can use to read email and surf 10 points the Internet). A communications professor at a university believes this percentage is higher among community college students. She selects 360 community college student at random and finds that 149 of them have a smart phone. Then in testing the hypotheses: Ho: p = 0.33 versus Hp...
According to a Pew Research Center study, in May 2011, 33% 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 349 community college students at random and finds that 138 of them have a smart phone. In testing the hypotheses: H0: p = 0.33 versus Ha: p > 0.33, she calculates...
According to a Pew Research Center study, in May 2011, 33% 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 349 community college students at random and finds that 138 of them have a smart phone. In testing the hypotheses: H0: p = 0.33 versus Ha: p > 0.33, she calculates...
According to a Pew Research Center study, in May 2011, 30% 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 441 community college students at random and finds that 140 of them have a smart phone. Then in testing the hypotheses: H0: p = 0.3 versus Ha: p > 0.3, what...
According to a Pew Research Center study, in May 2011, 39% 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 317 community college students at random and finds that 143 of them have a smart phone. Then in testing the hypotheses: H0: p = 0.39 versus Ha: p > 0.39, what...
According to a Pew Research Center study, in May 2011, 37% 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 465 community college students at random and finds that 176 of them have a smart phone. Then in testing the hypotheses: H0: p = 0.37 versus Ha: p > 0.37, what...