hello, the question says

a random sample of 500 house holds in acornhooek was selected and several variables were recorded. which of the following is not correct?

1) household total income is a ratio scaled variable

2) household income which was rounded to the nearest R100 ca be treated as a continuous variable even though it is discrete

3) the primary language used at home is a nominal scaled variable

4) socio-economic status which was coded as 1= low income, 2 = middle income, 3= high income is an interval scaled variable

5) the number of persons in the household as a discrete variable