A random sample of 900 13- to 17-year-olds found that 479 had a computer in their room with Internet access.

A random sample of 900 13- to 17-year-olds found that 479 had a computer in their room with Internet access. Let p be the proportion of all teens in this age range that have a computer in their room with Internet access. Does the data provide good evidence that more than half of teens in this age range have a computer in their room with Internet access?

b. State Ho and Ha

c. Calculate the test statistic (if applicable – state the degrees of freedom)

d. Find the p-value

e. What is the conclusion for this problem? Do you reject Ho?

h. How large a sample n would you need to estimate p with margin of error 0.02 with 80% confidence? Use the most conservative guess for p.