Hi could any body me on this question

which of the following is not a polling error?

using a biased sample

using a push poll

using a small polling sample

using a random sample

answer; i believe its (cpr);

lots of people lost money in both

in which two ways were the northeast woodland indians and the southeast indians similar? both collaborated to form the iroquois confederacy. both cultivated the crops of corn, beans, and squash. both lived in rich environments of swamps and rivers. both lived in tree-bark dwellings called wigwams. both expected men to hunt, while women farmed.