PO218 Lecture Notes - Lecture 5: Aadhaar, Statistical Inference, Simple Random Sample
Document Summary
We cannot fully assure ourselves that our samples are representative, but we can maximize the chances of a representative sample by following the principle of epsem (equal probability of. Selection method), the fundamental principle of probability sampling. Epsem principle, we select the sample so that every element or case in the population has an equal probability of being selected. Our goal is to select a representative sample, and the technique we use to achieve it is to follow the rule of epsem. Then, select cases for the sample when their identification number corresponds to the number chosen from the table. In other words, the fact that a sample is selected according to epsem does not guarantee that the sample will be an exact representation or microcosm of the population. One of the great strengths of inferential statistics is that they allow the researcher to estimate the probability of this type of error and interpret results accordingly.
