- Data from Myers is on web page. Like most data, it needs editing before use.

- some fun moving points around
- VO2 max (Orginal version, ascii, CSV)
- parameters and standard errors
- Which should be X and which should be Y?

- Tukey: peeling the onion
- Can look at Y vs X plot
- Creating residuals: Y - Y-hat
- residuals provide better microscope
- Easier to see curvature with residuals
- Easier to see hetroskadasticity with residuals
- Saving residuals allows checking for normality
- After removing a problem--look again for even more detailed problems

- Normal probability/quantile plot (M: p 60 - 66)
- Sorted guess of true value plotted vs sorted data
- Can work for any distribution
- straightness easier to detect than correct curvedness
- Shapes to consider:
- curved = skewedness
- s-shaped = tail thickness problems (mostlikely too many outliers)
- stairsteps = binomial/integer data

- Kolmogorov-Smirinov test
- Differences in CDF
- Sensitive for skewedness and binomial data :-)
- Arbitarilly large outlier is permitted. Hence it is resistant to change. Is this a good thing?
- Other tests could be done

- Revisit data

Last modified: Thu Feb 1 08:56:13 2001