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You see a friend of yours at a store, and her eyes are red and full of tears. You immediately go over to comfort her, assuming she has had another fight with her boyfriend. As you get to her, you ask what that "awful guy has done to her now." Your friend acts surprised that you would criticize the "love of her life." When you ask why she is crying, she tells you that her allergies are really acting up, and she is at the store to buy some allergy medicine. Your error with your friend occurred because you
Random Sampling
A method in statistical analysis where individuals or items are selected from a larger population entirely by chance, ensuring that every member has an equal opportunity of being chosen.
Convenience Sampling
A non-probability sampling method where participants are selected based on their availability and proximity to the researcher.
Judgment Sampling
A sampling method where the samples are selected based on the opinion of an expert, rather than random selection.
Central Limit Theorem
A statistical theory stating that, given a sufficiently large sample size from a population with a finite level of variance, the mean of all samples from the same population will be approximately equal to the mean of the population.
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