Hypothesis testing

Hypothesis Testing

Scientific Hypotheses and the Scientific Method

• Science - search for natural explanations of natural phenonmena
• Methodology - Scientific Method (hypothetico-deductive method)

Steps of the scientific method

1. Search for information
2. Ask Questions
3. Develop testable hypotheses
4. Test hypothesis - design experiment
5. Collect data
6. Analyze data
7. Interpret results
8. Answer question from above
9. Present the results - oral, written

Statistical Hypotheses and Statistical tests

• 2 hypotheses for each statistical test
•  Null hypothesis - statement of no differences
• Alternate hypothesis - statement of an existing difference
• Two-tailed and one-tailed variations