Understand and use the approximate margin of error. 𝐸 = 𝑧 𝑠 √𝑛

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Understand and use the approximate confidence interval (𝑥̅ − 𝑧 𝑠 √𝑛, 𝑥̅ + 𝑧 𝑠 √𝑛), as an interval estimate for 𝜇, the population mean, where 𝑧 is the appropriate quantile for the standard normal distribution.

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Understand and use the concept that there are variations in confidence intervals between samples and that most but not all confidence intervals contain 𝜇.