TNAG-1445-FCO40-1929-Constitutional-development-in-Hong-Kong-1986 — Page 111

SAMPLING PROCEDURE

1.

Household Selection

For each check, SRH Fieldwork Department selects about two thousand telephone numbers from the current telephone directory. The selection process is to firstly establish a starting point in the telephone directory, and then select telephone numbers at a fixed interval i.e. select every nth number from the starting point and from each preceding number.