Wrapup 2: Statistical Inference

1 Translate research question into parameter of linear model.

• Why so many hypothesis specified in terms of the mean?

2 Distribution of the mean?

• Unbiased
• SE
• SD vs SE in function of sample size
• Normal data
• Mean vs median

3 Confidence interval

• Interpretation
• Width?

4 Hypothesis testing

• Reseach question
• Modelling data
• Translation research question to model parameters
• H0 vs H1
• Test statistic
• One sided vs two sided
• P-value
• Errors
• Accepting vs rejecting H_0
• Importance of Assumptions?

4.1 Different tests

• One sample T-test
• Paired T-test
• Two sample T-test

4.2 What if assumptions are not met?

• Rank tests?
• H0 vs H1

4.3 What affects the power of a test?

---

This work is licensed under the CC BY-NC-SA 4.0 licence.