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HOW TO FIND POOLED TWO SAMPLE T CONFIDENCE INTERVALS WITH TI83 CALCULATOR

Steps Key Sequence Screens
1. Follow steps 1–9 for two–sample t CI OR
steps 1–7 for two–sample t CI using data
   
2. Enter yes for Pooled press ENTER on Yes
3. Calculate CI once, ENTER
4. Scroll down to find more calculations Press
In this case the 95% CI is –9.858 to 24.658.