An Estimation of the Design Effect for the Two-stage Stratified Cluster Sampling Design
نویسندگان
چکیده
The precision of parameters estimation are determined by the sample size and the sampling design used in a study. Due to such practical constraints as the budget and manpower, most large-scale educational studies would not adopt the simple random sampling design. TIMSS 2007 used a two-stage stratified cluster sampling design. In the first stage, about 150 schools were selected according to some variables of interest, such as school types or locations. In the second stage, which is the clustering sampling stage, one or two classes in the sampled school were selected at random and from which all students were surveyed.
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