AP Statistics: Confidence Interval for Difference between 2 Means

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This video teaches you how to construct a confidence interval for the difference between two sample means.

If you are interested in practice AP questions to help prepare you for the AP test in May please utilize Barron’s AP Statistics Question Bank. Access via the web or by downloading the app in iTunes or the Google Play Store. Links are below:
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your video was quite interesting though u were supposed to show us exactly how u came up with 1.659 at 108 degrees of freedom.thank u so much

faraisvudu
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Hello, Michael! I did this problem and I got df=95.9128. Everything else was pretty much the same. How did you arrive at df=108?

mariano_regalado