Emoticons. The Web site www.gamefaqs.com asked, as their question of the day to which visitors to the site were invited to respond, Do you ever use emoticons when you type online? Of the 87,262...

Emoticons. The Web site www.gamefaqs.com asked, as their question of the day to which visitors to the site were invited to respond, Do you ever use emoticons when you type online? Of the 87,262 respondents, 27% said that they did not use emoticons. ;-(

a) What kind of sample was this?

b) How much confidence would you place in using 27% as an estimate of the fraction of people who use emoticons?