Chiang Mai Journal of Science

This paper incorporates an unequal probability inverse sampling with adaptive cluster sampling. Unbiased estimators of the population total and its variance are given. The proposed sampling design is compared with the inverse adaptive cluster sampling design using simulation study. The results indicate that the proposed sampling design can be more efficient than inverse adaptive cluster sampling design. In particular, when an auxiliary variable is highly correlated to the study variable, the estimator under the proposed sampling design produces large efficiency.