10-18 math

# This is why its called a 95 confidence interval you

This preview shows page 1. Sign up to view the full content.

This is the end of the preview. Sign up to access the rest of the document.

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...
View Full Document

## This document was uploaded on 02/25/2014 for the course PSYC 3101 at Colorado.

Ask a homework question - tutors are online