Understand and use the approximate margin of error, 𝑧√𝑝̂(1−𝑝̂) 𝑛.

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Understand and use the approximate confidence interval, (𝑝̂ − 𝑧√𝑝̂(1−𝑝̂) 𝑛, 𝑝̂ + 𝑧√𝑝̂(1−𝑝̂) 𝑛), as an interval estimate for 𝑝, the population proportion, where 𝑧 is the appropriate quantile for the standard normal distribution.

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Understand and use the relationship between margin of error, level of confidence and sample size.