Age is none of the items listed. Age is ratio data.
http://wiki.answers.com/Q/Can+age+be+an+ordinal+data
Treating nominal-level data as interval leads to nonsensical results, but treating ordinal data as interval is commonly done.
http://www.chacha.com/question/can-nominal-level-data-b...
The data are in nominal thousands of US dollars ($1,000).
http://data.econ.ucdavis.edu/data/undata/FAQ_on_NBER-UN...
We provide real oil prices from 1980 in Figure 1.17 in the April 2008 WEO publication. Please click here for the data behind the chart in CSV format. You may want to send an e-mail to the IMF Commodities Unit at commodities@imf.org if they ...
http://forums.imf.org/showthread.php?t=129
Interval means where each unit measures an equal amount. Eg. the Farenheit temperature scale, Pounds, Dollars, Years, Date (BC/AD). ANOVA and ‘t’ tests often used here. With interval measurement scales, one unit on the scale represents the ...
http://rtjhomepages.users.btopenworld.com/Whichstats6.h...
Or if you don't want a entire thesis... Nominal data are categories that have no numerical meaning such as one's religious denomination or city or residence. the values can't logically be added, subtracted, or even sorted. Ordinal data are ...
http://answers.yahoo.com/question/index?qid=20080624185...
Categorical data is data that can be sorted into categories. For example, people can be sorted by hair colour; black, brown, blond, red, other or by gender; male or female. When creating categorising, it's important that each value is only ...
http://answers.yahoo.com/question/index?qid=20090804000...