This book contains an account of the body of theory that has been built up to provide a background for good sampling methods. In most of the applications for which this theory was constructed, the aggregate about which information is desired is finite and delimited - the inhabitants of a town, the machines in a factory, the fish in a lake. In some cases it may seem feasible to obtain the information by taking a complete enumeration or census of the aggregate. Administrators accustomed to dealing with censuses were at first inclined to be suspicious of samples and reluctant to use them in place of censuses. Although this attitude no longer persists, it may be well to list the principal advantages of sampling as compared with complete enumeration.
Apa yang dikatakan orang - Tulis resensi
Kami tak menemukan resensi di tempat biasanya.
Edisi yang lain - Lihat semua
allocation amount appears apply approximation assume average bias calculate called cities cluster compared comparisons complete compute consider constant contains correct correlation cost denotes distribution draw drawn effect elements equal error example expected expression farm field fixed follows formula frequency function given gives Hence households increase interview known less limits linear measurement method natural needed normal Note obtained optimum persons population practice precision present probability problem produced proportional quantity ratio estimate regression relation relative replacement sample estimate sample mean selection separate shown shows simple random sample sizes specific square standard strata stratified stratified random sampling stratum suggests Suppose survey systematic sample Table taken term theorem theory total number unbiased estimate units usually variables variance variation weight