Ordinal scale and statistics in medical research.
A survey of the 1982 editions of 12 medical journals showed that in at least 70% of 175 papers employing ordinal measurement scales, statistical methods were used, which do, in fact, assume a more refined measurement scale. Non-parametric methods suited for analysis of ordinal data are listed.
Forrest
M
M
Andersen
B
B
D012106:Research; D013223:Statistics as Topic