Stratified random sampling

Question 1

Definition

Answer 1

Stratified random sampling involves the division of the sampling frame into groups in order to ensure that the sample is representative. The researcher identifies the important variables that need to be controlled and allocates the sampling units to different groups according to these variables.

Question 2

BHPS

Answer 2

The BHPS is a longitudinal and annual survey consisting of a nationally representative sample of about 10,000 households with around 20,000 interviewed individuals. The sample is a stratified clustered design drawn from the Postcode Address File. Aim is to further our understanding of social and economic change at the individual and household level in Britain and the UK

Question 3

Phillipson et al

Answer 3

Wanted to research the family and community life of older people by comparing the findings from 1950’s and 1960’s studies. The samples were stratified by age and gender, and also by ethnicity. 62% of respondents were women and 38% men, reflected the proportions of older men and women in the population.