canada has a contribution program and there interested in checking phone line records without permission of anyone. 1000 people were selected in a canadian region and were called and each were asked to respond to several questions.

is is observational or experimental.
whats the sample.
is it random?

heres what i think:
its obvervational, because they can answer anyway they like.
the sample is the 1000 people selected.
and its completely random because they could dial random phone numbers.

is this correct?