PSYB04H3 Chapter Notes - Chapter 7: Laboratory Mouse, Sampling Bias, Stratified Sampling
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American drivers, women around the world, and online shoppers. Just because a sample comes from the population of interest, doesn"t mean that sample is representative of the population of interest. For example, if a researcher"s population of interest in a study is. For example, if a researcher wants to sample high school students in the state of. For example, a group of researchers might want to be sure their sample of 1000. Canadians includes people of south asian descent in the same proportion as in the. Canadian population (which is 4%): thus, they might have two categories (strata) in their population: south asian. In a sample of 1000, they would make sure to include at least 40 members of the category of interest (south asian canadians). It is important not to confuse random sampling with random assignment - they are two different things.
