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# Confidence interval for proportion

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Death Penalty Survey:
In a Gallup poll, 491 randomly selected adults were asked whether they are in favor of the death penalty for a person convicted or murder, and 65% of them said that they were in favor.
a. Find the point estimate of the percentage of adults who are in favor of this death penalty.
b. Find a 95% confidence interval estimate of the percentage of adults who are in favor of this death penalty.
c. Can we conclude that the majority of adults are in favor of this death penalty? Explain.

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#### Solution Summary

The solution provides step by step method for the calculation of confidence interval for proportion. Formula for the calculation and Interpretations of the results are also included. Interactive excel sheet is included. The user can edit the inputs and obtain the complete results for a new set of data.

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