My course notes and textbook express this differently:(adsbygoogle = window.adsbygoogle || []).push({});

To construct the confidence interval for diff. between means,

Course notes

([itex]\bar{x1}[/itex] - [itex]\bar{x2}[/itex])[itex]\pm[/itex]E

Textbook

([itex]\bar{x1}[/itex] - [itex]\bar{x2}[/itex]) - E < [itex]\mu[/itex]_{1}- [itex]\mu[/itex]_{2}< ([itex]\bar{x1}[/itex] - [itex]\bar{x2}[/itex]) + E

why the difference?

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# Confidence interval for difference between means

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