# Confidence Interval & Hypothesis Testing of Proportion

Drinking Habits: A Readers Digest Gallup Survey on drinking habits.....

Christmas Presents: The Arizona Republic conducted a telephone poll........

Families in Poverty: In 2000, 8.6% of all U.S. families had income below the poverty level...........

See the attached file.

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#### Solution Summary

The solution provides step-by-step method for the calculation of test statistic for population proportion, confidence interval for population proportion, sample size and margin of error. 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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