Nominal scales Ordinal scales The category ordering helps us learn them, The term "ordinal refers to order or ordering but means nothing in terms of the variable This suggests a quantifiable ranking from mos itself. We could list " West" before "East"or to least or some other logical sequence or dering of a variable's categories. When the Shanghai"before "Beijing"and lose no quantification is by rank order, it suggests a information sequence but not yet an exact amount of a variable Feminists could place Women" before To say that in terms of population size China Men, assigning 1 to Women "and 2 to ranks first: India, second and the former Men U.S.S.R., third gives us an ordering. But we do not know how much larger China is than India We still do not know the exact population sizes Ordinal scales Ordinal scales Ordinal data are similar to nominal data in Level of education can be an ordinal that they are labels for non-numeric data variable. We could classify education as The only difference is that they have a ly logical order. However, the magnitude of the numeric label is still not important. 2=Secondary 3=Tertiary The category 3 is higher than the tegories 1 and 2 but the difference between 1 and 2 or 2 and 3 are not equal5 9 Nominal scales • The category ordering helps us learn them, but means nothing in terms of the variable itself. We could list "West" before “East" or “Shanghai" before “Beijing" and lose no information. • Feminists could place “Women” before “Men”, assigning 1 to “Women” and 2 to “Men”. 10 Ordinal scales • Ordinal data are similar to nominal data in that they are labels for non-numeric data. The only difference is that they have a logical order. However, the magnitude of the numeric label is still not important. 6 11 Ordinal scales • The term “ordinal” refers to order or ordering. This suggests a quantifiable ranking from most to least or some other logical sequence or ordering of a variable's categories. When the quantification is by rank order, it suggests a sequence but not yet an exact amount of a variable. • To say that in terms of population size China ranks first; India, second; and the former U.S.S.R., third gives us an ordering. But we do not know how much larger China is than India. We still do not know the exact population sizes. 12 Ordinal scales • Level of education can be an ordinal variable. We could classify education as 1=Less than secondary 2=Secondary 3=Tertiary • The category 3 is higher than the categories 1 and 2 but the differences between 1 and 2 or 2 and 3 are not equal