In October 2007, the Gallup Poll asked a sample of 1010 adults, "Are you in favor of the death penalty for a person convicted of murder?" The proportion who said they were in favor was 69%.Gallup says that the margin of error for this poll is ±3 percentage points.
A.
The true value is within 3 percentage points of the result obtained in this poll.
B.
The results are based on a method that is 95% of the time within 3 percentage points of the true value.
C.
The result of the poll is different from the true value by more than 3 percentage points.
Answer: B.
The results are based on a method that is 95% of the time within 3 percentage points of the true value.
Which of the following statements correctly explains the phrase "margin of error plus or minus 3 percentage points?
A.
The true value is within 3 percentage points of the result obtained in this poll.
B.
The results are based on a method that is 95% of the time within 3 percentage points of the true value.
C.
The result of the poll is different from the true value by more than 3 percentage points.
Answer: B.
The results are based on a method that is 95% of the time within 3 percentage points of the true value.
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