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Unformatted text preview: “Margin of error plus or minus three percentage points” is shorthand for this statement: If we took many samples using the same method we used to get this one sample, 95% of the samples would give a result within plus or minus 3 percentage points of the truth about the population. We say we are 95% confident that the true value of the parameter lies within the margin of error. confidence statement – made up of a margin or error and a level of confidence The margin of error measures how close the sample statistic lies to the population parameter. The level of confidence says what percent of all possible samples satisfy the margin of error....
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- Spring '07
- Statistics, population parameter, sample statistic