Skip to Main Content
Due to a lapse in federal funding, this USDA website will not be actively updated. Once funding has been reestablished, online operations will continue.
Planning and processing multistage samples with a computer programMUST.Author(s): John W. Hazard; Larry E. Stewart
Source: Gen. Tech. Rep. PNW-GTR-011. Portland, OR: U.S. Department of Agriculture, Forest Service, Pacific Northwest Range and Experiment Station. 15 p
Publication Series: General Technical Report (GTR)
Station: Pacific Northwest Research Station
PDF: View PDF (700 KB)
DescriptionA computer program was written to handle multistage sampling designs in insect populations. It is, however, general enough to be used for any population where the number of stages does not exceed three. The program handles three types of sampling situations, all of which assume equal probability sampling. Option 1 takes estimates of sample variances, costs, and either a specified cost or precision and computes the optimum number of sampling units to select prior to sampling. Option 2 takes the observations, continuous or discrete, from a pilot survey or actual inventory and estimates the mean and variances. It then computes an estimate of the optimum number of units which should have been taken. Option 3 is a special case of the situation in option 2 where some of the observations are lost or for some other reason an unequal number of subunits per primary unit exists. An explanation of multistage sampling and a processed example are included.
- You may send email to email@example.com to request a hard copy of this publication.
- (Please specify exactly which publication you are requesting and your mailing address.)
- We recommend that you also print this page and attach it to the printout of the article, to retain the full citation information.
- This article was written and prepared by U.S. Government employees on official time, and is therefore in the public domain.
CitationHazard, John W.; Stewart, Larry E. 1974. Planning and processing multistage samples with a computer programMUST. Gen. Tech. Rep. PNW-GTR-011. Portland, OR: U.S. Department of Agriculture, Forest Service, Pacific Northwest Range and Experiment Station. 15 p
KeywordsSampling design, computer program, forest entomology
- PROFIT-PC: a program for estimating maximum net revenue from multiproduct harvests in Appalachian hardwoods
- Composite estimation for forest inventories using multiple value groups and strata
- Perpendicular distance sampling: an alternative method for sampling downed coarse woody debris
XML: View XML