METHODS: The study uses stratified random sampling technique for the experimental study undertaken to measure skin conductivity. (content.iospress.com)
Ninety - eight Hong Kong Chinese children aged under 15 years with prenatal tobacco exposure and 98 age - and gender - matched controls were recruited from a population health study with stratified random sampling. (academic.oup.com)
In addition, two studies using stratified random sampling found that a high - quality home visiting program positively impacted school readiness through better parenting practices, increased reading to children at home, and a greater likelihood of enrollment in preschool programs. (zerotothree.org)