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Exercises: Types of Data

Question 2.1

What types of variable are the following (nominal, ordinal, metric discrete or metric continuous)?

Answer

Question 2.2

The following table is en extract from a paper looking at caries prevalence amongst children in Wick, Scotland. What types of variable are represented here?

(dmft = decayed, missing and filled teeth total)

Variable
n 106
mean
dmft 2.63
% caries free 27.4%
Decayed/filled teeth 2.39
Extracted teeth 0.75
proportion
Social class I & II 15.0%
Social class III 42.5%
Social class IV & V 30.2%
Social class unknown 12.3%

Answer