I am preparing for the statistics quiz. The materials that I have to study are so much that I could not manage it during the self-study periods yesterday. Several things that are important for today's quiz are sampling, binomial distribution, normal distribution, and calculations. Sampling is methodology to collect sample from a population. We need to be careful when making samples because if we do not consider lurking variables, we might fall into misunderstanding the relationship between two variables. Moreover, bias can happen when the method is wrong in collecting samples. Binomial distribution is a probability distribution of an event in which there are only two types of occurrence. Normal distribution is a distribution in which the occurrences are distributed continuously rather than discretely.
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