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. Suppose you want a margin of error half as large as estimated by Gallup. How many people must you plan to interview?

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. Suppose you want a margin of error half as large as estimated by Gallup. How many people must you plan to interview?

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.
Suppose you want a margin of error half as large as estimated by Gallup. How many people must you plan to interview?



A.
4040
B.
505
C.
2020


Answer: A. 4040


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