STAT 1100 Study Guide - Final Guide: Simple Random Sample, Standard Score, Sampling Frame
Document Summary
Process of sampling surveys: determine what you want to find out, know what the population is, determine sampling frame, draw target sample, get actual sample, analyse. Population all items we are interested in. Randomness necessary for fair and representative of the population. A sample drawn so that every possible sample of the size we plan to draw has an equal chance of being selected. Also each combination has an equal chance of being selected. Divide population into groups of similar individuals (called strata) and take simple random sample from each of these groups. Strata should be similar within and different between. Chose groups or clusters at random from the population and take a census form these groups. Use a fixed interval to choose members form a sampling frame. Not really an error, legitimate difference from population and to be expected. If bias is present we cant draw valid conclusions. Part of the population is less represented than it should be.
