You can find some interesting polls online. Anyone can become part of the sample just by clicking on a response. One such poll asked, “Do you prefer watching first-run movies at a movie theater, or waiting until they are available to watch at home or on a digital device?” In all, 8896 people responded, with only 12% (1118 people) saying they preferred theaters. You can conclude that

(a) American adults strongly prefer watching movies at home or on their digital devices.

(b) the high nonresponse rate prevents us from drawing a conclusion.

(c) the sample is too small to draw any conclusion.

(d) the poll uses voluntary response, so the results tell us little about all American adults.

(e) American adults strongly prefer seeing movies at a movie theater.