Estimate the true proportion with 90% confidence. Round intermediate answers to five decimal places. Round your final answer to one decimal place.

Question

Home Internet Access In a recent year, a study found that 76%

 of adults ages 18

–29

 had internet access at home. A researcher wanted to estimate the proportion of undergraduate college students (18

–29

 years) with access, so she randomly sampled 182

 undergraduates and found that 157

 had access. Estimate the true proportion with 90%

confidence. Round intermediate answers to five decimal places. Round your final answer to one decimal pl

Answer 1

phat = 157/182 = 0.863

90 CI = phat +- z-critical * sqrt(phat * (1-phat)/n), where n = 182. z-critical for 90% CI = 1.645