random sample

n.

随机抽样调查；

Random Sample
Random Sample
Random Sample
Prevalence of elderly abuse: A random sample survey
The prevalence of elder abuse: A random sample survey.
Postural balance in a random sample of 7,979 subjects aged 30 years and over.
Weight, weight change, mortality in a random sample of older community-dwelling women.
Correlates of same-sex sexual behavior in a random sample of Massachusetts high school students
Risk factors for clinical mastitis in a random sample of dairy herds from the southern part of the Netherlands.
Social network interaction and mortality. A six year follow-up study of a random sample of the Swedish population.
The Relation Between the Number of Species and the Number of Individuals in a Random Sample of an Animal Population
Waist circumference action levels in the identification of cardiovascular risk factors: prevalence study in a random sample.
Combined effects of job strain and social isolation on cardiovascular disease morbidity and mortality in a random sample of the Swed...