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Question

# Economy worries. During the week of April 15, 2013, a Gallup Poll requested 1500 U.S. adults, aged 18 or over, how they rated economic conditions. Only $17 \%$ rated the economy as Excellent/Good. Make a $95 \%$ confidence interval for the true proportion of Americans who rated the U.S. economy as Excellent/Good.

Solution

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We were given a situation where the sample proportion $\hat{p}$ of Indian adults who rated the Indian economy as improving is $\hat{p}=29\%$. This is from a survey done by Gallup Poll which involved $n=1500$ Indian adults.

We were then asked to compute for the $95\%$ confidence interval for the true population proportion $p$ where $p$ is the true proportion of Indian adults who rated the economy as 'Getting better'.

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