The Gallup organization conducts a poll to see how much support there is for a constitutional amendment guaranteeing the right to abortion. They announce that 23 percent of Americans are in favor of such an amendment, with a 95 percent confidence margin of error of 3.4 percent. If the results of the above poll were described using a 90 percent confidence statement, what would happen to the margin of error?
A) It would be greater than 3.4 percent.
B) It would be less than 3.4 percent.
C) It would still be 3.4 percent.
D) More information is needed to determine how the margin or error would change

Question

Quizplus · Accepted Answer

The margin of error decreases when the confidence level decreases, so moving from a 95% to a 90% confidence level would reduce the margin of error from 3.4 percent.

The Gallup Organization Conducts a Poll to See How Much