Question

In a random sample of 125 adults, 64% say they have used a cellular phone to access the Internet. We want to test a researcher’s claim at the 5% significance level that more than 60% of U.S. adults have used a cellular phone to access the Internet.

[2 points] Find the null and alternate hypotheses.

[6 points] By hand, showing work, find the test statistic.

[4 points] Sketch the sampling distribution labeling the test statistic and the P-value.

[2 points] The P-value is 0.18. Using a significance level of 5%, state if you are rejecting the null hypothesis or failing to reject the null hypothesis. (Circle only one.)

Reject the null hypothesis            Fail to reject the null hypothesis

[4 points] Give conclusion in a non-technical English sentence in context.

Answer 1

salution:- a) Ho: p=0.6 Ha: p > 0.6 0.91 b) z= -b p(1-P) 0-64-0 0.680.4 1 125 9) Prralue Tuce 0.91 d) P-value = 0.18 2=0.05 P-value sa [B Fail to reject Ho e) There is not sufficient evidence to support the claim that more than 60% of us adults have used in a cellular bhane to access the internat