40 - Goodness of fit

How well do the observed data correspond to an idealized situation (theory)?

Practice

Chapter 26 # 5, Read pages 618-626

Vocabulary

Chi-squared model, cell, chi-squared statistic

Study Questions

1. Compare and contrast chi-squared model with the normal models, and the t-models.
2. What is the Goodness of fit test?
3. How do we determine expected counts for a given cell in the data table?
4. How do we interpret the chi-squared statistic? Is it like/unlike the p-value or “t-value”?

Resources

1. Slide Deck: 40-Goodness-of-fit.pdf