Please assist.

(b) Proportion of US adult Internet users who use a social networking site. Round your answers to three decimal places. The 95% confidence interval is e Textbook and Media Hint (c) Proportion of all US adults who use a social networking site. Round your answers to three decimal places. The 95% confidence interval is Use the confidence interval to estimate whether it is plausible to estimate that 50 % of all US adults now use a social networking site