Question pretext
This question, in conjunction with other variables will assist in the analysis of data that varies by sex. Examples are income levels, educational attainment, occupation and the number of persons in the older age groups. Information on sex is essential in calculating population projections for a country.
It is not always possible to tell the sex of a person by the name alone. Therefore you must ask this question whenever you are not interviewing the person to whom the question relates. If this is not possible, a person's sex can usually be determined from the name or relationship entry.