3.28 The death penalty. In October 2014, the Gallup Poll asked a sample of 1017 adults, “Are you in favor of the death penalty for a person convicted of murder?” The proportion who said they were in favor was 63%.
(a) Approximately how many of the 1017 people interviewed said they were in favor of the death penalty for a person convicted of murder?
(b) Gallup says that the margin of error for this poll is ±4 percentage points. Explain to someone who knows no statistics what “margin of error ±4 percentage points” means.