Margin of error. Bootstrapping The margin of error is half of the interval.

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Presentation transcript:

Margin of error

Bootstrapping The margin of error is half of the interval.

Central Limit Theorem

Margin of error of the mean 95% Approximately

Margin of error of a proportion The greatest margin of error occurs when

Margin of error of a proportion Rule of thumb becomes

Margin of error of a proportion It should only be applied when the probability is between 0.3 and 0.7

Margin of error for differences If the results are from the same survey or poll: Margin error of difference = 2 x Margin of error of the Poll

Margin of error for differences If the results are from two independent surveys or polls: Margin error of difference = 1.5 x Average of error of each Poll