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Unit: Confidence intervals

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Introduction to confidence intervals

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Estimating a population proportion

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Practice

Conditions for a z interval for a proportionGet 3 of 4 questions to level up!
Finding the critical value z* for a desired confidence levelGet 3 of 4 questions to level up!
Calculating a z interval for a proportionGet 3 of 4 questions to level up!
Sample size and margin of error in a z interval for pGet 3 of 4 questions to level up!

Estimating a population mean

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Practice

Conditions for a t interval for a meanGet 3 of 4 questions to level up!
Finding the critical value t* for a desired confidence levelGet 3 of 4 questions to level up!
Calculating a t interval for a meanGet 3 of 4 questions to level up!
Sample size and margin of error in a confidence interval for a meanGet 3 of 4 questions to level up!

More confidence interval videos

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About this unit

Confidence intervals give us a range of plausible values for some unknown value based on results from a sample. This topic covers confidence intervals for means and proportions.