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# AP Statistics 8.5.2 - Estimating Differences of Means, Independent Samples - SD Unknown

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Author: Miguel Ramirez
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- For the school year 2013-2014 this tutorial has to be covered by students during week Feb 18 - Feb 21

- This tutorial is part of the AP Statistics course at Galena Park High School

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Tutorial

## Estimating Differences of Means for Independent Samples - SD Unknown

Video lecture for Brase-Brase Understandable Statistics 8 Ed, Ch 8.5

Source: Chalk Dust Productions, Houghton Mifflin Co

## Estimating Differences of Means of Independent Samples - Pooled SD, By Dana Mosely

Video lecture for Brase-Brase Understandable Statistics 8 Ed, Ch 8.5

Source: Chalk Dust Productions, Houghton Mifflin Co

## Ch 8-5 - Notetaking - Estimating Differences of means - Unknown Standard Deviation

Notetaking help for video-lecture Estimating Differences of Means Independent Samples - SD Unknown Standard Deviation

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Source: Myers Linda: Brase-Brase Understandable Statistics Notetaking Guide

## 95% Confidence Interval for Two Means: Worked Example, By Keith Bower

Problem worked using the error E exact formula