Interpret what a poll's margin of error actually tells you about sampling variability.
81 original sample statistics and margin of error questions in the SAT Ranker bank, with instant scoring and an Elo-based rank once you sign up. Below are a few free samples with full explanations.
A poll of 200 randomly selected voters found that 53% support a proposed policy, with a reported margin of error of 4%. Which choice best interprets the margin of error?
A margin of error describes the expected range of variation between a sample statistic and the true population value due to random sampling, not a guarantee, a proof of methodology, or a nonresponse rate.
A poll of 400 randomly selected voters found that 51% support a proposed policy, with a reported margin of error of 5%. Which choice best interprets the margin of error?
A margin of error describes the expected range of variation between a sample statistic and the true population value due to random sampling, not a guarantee, a proof of methodology, or a nonresponse rate.
A poll of 200 randomly selected voters found that 58% support a proposed policy, with a reported margin of error of 5%. Which choice best interprets the margin of error?
A margin of error describes the expected range of variation between a sample statistic and the true population value due to random sampling, not a guarantee, a proof of methodology, or a nonresponse rate.
A poll of 1000 randomly selected voters found that 41% support a proposed policy, with a reported margin of error of 2%. Which choice best interprets the margin of error?
A margin of error describes the expected range of variation between a sample statistic and the true population value due to random sampling, not a guarantee, a proof of methodology, or a nonresponse rate.
A poll of 800 randomly selected voters found that 50% support a proposed policy, with a reported margin of error of 3%. Which choice best interprets the margin of error?
A margin of error describes the expected range of variation between a sample statistic and the true population value due to random sampling, not a guarantee, a proof of methodology, or a nonresponse rate.