In a recent Gallup poll 55 of a sample of 1028 US adults sup

In a recent Gallup poll, 55% of a sample of 1028 U.S. adults supported same-sex marriage.(a) Treating the data as a simple random sample, nd a 95% condence interval for the

percentage of all U.S. adults who support same-sex marriage.
(b) In fact, Gallup stated a 4 percentage point margin of error atthe 95% condence level, implying a condence interval of 51% to 59%. Why does thisdier from your result?