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Suppose a Gallup Poll Using a Sample of 400 Individuals

Question 17

Multiple Choice

Suppose a Gallup Poll using a sample of 400 individuals found that 25% of them supported a particular opinion. An interval that is 95% certain to contain the truth about the population percent who support that opinion is


A) 25% - 0.05% or 24.95% to 25.05%.
B) 25% - 0.25% or 24.75% to 25.25%.
C) 25% - 5% or 20% to 30%.
D) 25% - 20% or 5% to 45%.

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