خلاصة:
Nowadays, there is an increasing use of sampling methods in
network and spatial populations. Although the most common link-tracing
designs such as adaptive cluster sampling and snowball sampling have advantages
over conventional sampling designs such as simple random sampling
and cluster sampling, these designs still present many drawbacks. Adaptive
web sampling is a new link-tracing design that overcomes some of the drawbacks.
In this paper, after introducing adaptive web sampling design, an
application of this method to estimate total production of olive in Iran using
1382 census data of agriculture is presented. Then by conducting a simulation
study the performance of adaptive web sampling in estimating total olive
production will be compared with that of general inverse adaptive sampling.
ملخص الجهاز:
Adaptive Web Sampling and General Inverse Adaptive Sampling in Estimating Olive Production in Iran Ada Afshar∗and Hamidreza Navvabpour Allameh Tabataba’i University Nowadays, there is an increasing use of sampling methods innetwork and spatial populations.
In this paper, after introducing adaptive web sampling design, anapplication of this method to estimate total production of olive in Iran using1382 census data of agriculture is presented.
Finally in Section 8 by conducting simulations studies perfor- mances of adaptive web sampling and general inverse adaptive sampling in estimating total olive production using 1382 Iran census of agriculture data will be compared.
Res. Iran11(2014): 1–23 4 Strategies of Adaptive Web Sampling Thompson (2006a) proposed three new methods for estimating the popula- tion mean or proportion that second and third strategies provide additional fexibility in the sample selection.
In this section, a simulation study is used to estimate total olive produc- tion in Iran in 1382 by diferent designs of adaptive web sampling and general inverse adaptive sampling.
8. 1 Survey Design To conduct adaptive web sampling and general inverse adaptive sampling to estimate total olive production in Iran in 1382, Iran map is divided into the 684 units of equal-sized rectangles.
Also estimate of total olive production is obtained using general inverse adaptive sampling, withk= 7 and fnal sample sizes are used in adaptive web sampling design.
Table 6 shows the estimating Iran total olive production (in thousand tons) in 1382 using the general inverse adaptive sampling with estimates of best estimators in three strategies of AWS.