This is why its called a 95 confidence interval you

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Unformatted text preview: it’s the standard error of the statistic we’re computing a confidence interval from. For a single sample, SE!s the standard error of the mean, σM. For independent samples, SE i is the standard error of the difference between means, "M A # M B . Both of these standard errors are the same ones used in the formulas for the respective t statistics. The last bit of math for confidence intervals involves the confidence level. When the alpha ! level equals .05, whatever the true mean (or mean difference) is, there’s a 5% (.05) chance that we’ll get data that would lead us to mistakenly reject that true value. In other...
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This document was uploaded on 02/25/2014 for the course PSYC 3101 at Colorado.

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