In Global Context: Mental Health Study
Indiana University . Bloomington . Indiana
South Africa Sample Design
Sampling Plan and Timeline:
This study will be included in the Markinor M-Bus (Omnibus) study. These studies are weighted to represent South African adult population 16+ years.
I have however in the meantime also attached the 2004 M-Bus schedule which not only provides field dates, it also provides some technical specifications regarding our sample.
We offer clients two options in terms of sample sizes pertaining to our M-Bus: a metropolitan sample (sample size is 2000) and national sample (sample size is 3500: 2000 in metropolitan areas and 1500 in non-metropolitan areas).
50% of sample is females and 50% is males.
In order to put the
community sizes in
Metropolitan areas (population of 250000+) 33.7% of adult population
Metropolitan areas in
Non-metropolitan areas include the following:
Cities (population 100000 - 249999) 8.4% of adult population
Large towns (population 40000 - 99999 ) 5.2% of adult population
Small towns (population 8000 - 39999) 8.9% of adult population
Large/small villages (population (500- 7999) 3.4% of adult population
Rural (population less than 500 people) 40.3% of adult population.
Our sampling methodology for our M-Bus is as follows:
The sample is stratified by province and within province, by community size, city, township and suburb. Within each stratum, sampling points are selected at random.
In the case of blacks, five plots are selected from each sampling point in a random walk procedure. Within a plot all households living on this plot are listed, and one household is selected according to a random selection procedure. Within the selected household all male or female adults are listed and one is selected, again according to a random selection procedure.
If this person is not available for an interview (away, refused, sick), a substitute living in the same street is chosen who is of the same sex, age and working status,
In the case of whites, coloureds and Indians, five interviews are conducted around the selected sampling point, according to a quota on gender, and within gender, age and working status.
1022 E. Third Street, Bloomington, IN 47405 (812) 855-3841