The website www.gamefaqs.com asked, as their question of the day to which visitors to the site were invited to respond, “Do you ever read the end-user license agreements when installing software or games?" Of the 98,574 respondents, 63.47% said they never read those agreements—a fact that software manufacturers might find important.
a) What kind of sample was this?
b) How much confidence would you place in using 63.47% as an estimate of the fraction of people who don’t read software licenses?