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In May 2012, President Obama made history by revealing his support of gay marriage. Around that time, the Gallup Organization polled 1,024 U.S. adults about their opinions on gay/lesbian relations and gay marriage. They found that 54% of those sampled viewed gay/lesbian relations as "morally acceptable" and that 50% felt that gay marriage should be legal.
-A 90% confidence interval for the proportion of American adults who support gay marriage is (0.475, 0.524). Does this confidence interval provide evidence that the percentage of American adults who support gay marriage differs from 50%? State the significance level you are using.
A) No; significance level of 10%
B) No; significance level of 5%
C) Yes; significance level of 10%
D) Yes; significance level of 5%

Question

Quizplus · Accepted Answer

The 90% confidence interval (0.475, 0.524) includes the value 0.50, indicating that there is not enough evidence to conclude that the percentage differs from 50% at a 10% significance level.

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