Day 10 in SCI110: Regression and t-tests

Spring 2005 Schedule
Last time:
- Group proposals
- Investigation of properties of water (Chapter 10: 197-198)
- Acids and Bases
  - pH - potential of hydrogen - pouvoir hydrogene
  - mole - an Avogadro's number of something - 6.02 x 110²³ units (number of carbon atoms in 12 grams of carbon-12 is a mole).
  - Worksheet, pp. 42-43
  - Titration exercise (collecting data for regression/t-test)
Today:
- Regression of pH on Acid added
- t-test for difference in means (regular and extra strength Tums)
- Paired t-test for difference in means (heartbeat before and after exercise)
- Discuss project proposals
  - What is the null hypothesis? What is the alternative?
  - How much data is necessary?
  - Is your experiment replicable?
  - What analysis will you perform to reach your conclusion?
- Discussion of B questions, p. 19
- Practice Quiz (test prep)
- Review questions....
- Homework:
  - Prepare for exam!

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