1. which survey question is biased?
a. which is your favorite, pizza or spaghetti?
b. which subject is your favorite, math which is easy, or english, which is difficult?
c. who do you live with, both parents, mother only, father only, or another guardian?
d. should children be allowed to stay up as late as they would like?

2. game wardens use experiments to determine the number of fish in a lake. suppose 80 fish are caught, tagged, and released back into the lake. two weeks later 120 fish are caught, 3 of which are found to have tags. using this information estimate the number of fish in the lake.
a. 3,200
b. 600
c. 120
d. 280