1. Discrete or Continuous?

2. Hair color http://www.logona.co.uk/media/folio4/Logona_HairColor_Chart.jpg

3. Light Intensity http://leisure.prior-it.co.uk/images/Uplight1.jpg

4. Gender http://www.flatrock.org.nz/topics/society_culture/assets/gender.jpg

5. Age http://www.rah.sa.gov.au/nucmed/images/aging.gif

6. http://atlas.nrcan.gc.ca/sitefrancais/english/learningresources/carto_corner/ordinal.gif

7. Fertilizer Concentration http://www.noble.org/Ag/Economics/FertilizeOrNot/index.htm

8. Species of Animal http://www.baby-planet.com/images/end_species.jpg

9. Time http://freekick.wordpress.com/2007/01/

10. http://atlas.nrcan.gc.ca/sitefrancais/english/learningresources/carto_corner/ordinal.gif

11. Body Size http://cber.bio.waikato.ac.nz/images/Hikutaia_Cut_fish_600p.jpg

12. Types of plant in a marsh http://www.dcr.virginia.gov/natural_heritage/images/EIb_photo1_500.JPG

13. Average number of Phragmites in a Quadrat