Learn how representative samples and random samples differ and why combining them minimizes sampling bias for accurate data.

Producers of infant formula employ comprehensive food safety systems, including product testing to ensure those systems are working. A new study from the University of Illinois Urbana-Champaign finds ...

Sankhyā: The Indian Journal of Statistics, Series B (1960-2002), Vol. 61, No. 1, Sample Surveys (Apr., 1999), pp. 187-201 (15 pages) The balanced half sample (BHS) method is a popular method for ...

Several states with extensive water use databases rely upon the census approach. That is, data are collected for all water users withdrawing amounts greater than a specified threshold that varies from ...