A survey could also ask how many hours you spend online each day.

I never know how to respond to this question. Do I count device-hours? Only time when information is transferring via the Internet to some device I own? Only when I ask it to? Do I need to be looking at a screen? If so, then printouts of ffdn don't count? What about programs I've downloaded and then are running offline? (&c.)

Except you'd have to exclude IT workers (especially web developers). :)