SOLUTION: 1. In a Gallup poll of 557 randomly selected adults, 284 said that they were underpaid. Construct a 95% confidence interval estimate for the proportion of adults who say they are u

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Question 1056849: 1. In a Gallup poll of 557 randomly selected adults, 284 said that they were underpaid. Construct a 95% confidence interval estimate for the proportion of adults who say they are underpaid.
Mean Proportion
Answer by stanbon(75887) About Me  (Show Source):
You can put this solution on YOUR website!
In a Gallup poll of 557 randomly selected adults, 284 said that they were underpaid. Construct a 95% confidence interval estimate for the proportion of adults who say they are underpaid.
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p-hat = 284/557 = 0.51
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ME = z*sqrt(p*q/n) = 1.96*sqrt[0.51*0.49/557] = 0.04
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95% CI:: 0.51 - 0.04 < p < 0.51+0.04
95% CI:: 0.47 < p < 0.54
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Cheers,
Stan H.
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