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# Confidence intervals

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Confidence intervals and margin of errorConfidence interval simulationInterpreting confidence level exampleInterpreting confidence levels and confidence intervals

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Confidence interval exampleMargin of error 1Margin of error 2Conditions for valid confidence intervalsConditions for confidence intervals worked examplesReference: Conditions for inference on a proportionCritical value (z*) for a given confidence levelExample constructing and interpreting a confidence interval for pInterpreting a z interval for a proportionDetermining sample size based on confidence and margin of error

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!

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Introduction to t statisticsSimulation showing value of t statisticConditions for valid t intervalsReference: Conditions for inference on a meanExample finding critical t valueExample constructing a t interval for a meanConfidence interval for a mean with paired dataMaking a t interval for paired dataInterpreting a confidence interval for a meanSample size for a given margin of error for a mean

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!

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T-statistic confidence intervalSmall sample size confidence intervals