PSY 207 Lecture Notes - Lecture 6: Statistical Inference, Statistic, Sample Space
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Given that you have a sample from a population, how do you make conclusions about a population based said sample: we use inferences. Proportion of times a particular outcome occurs (relative frequency) Number of ways that a particular event can occur divided by the number of ways any event can occur. Total number of possible outcome that can occur. 1: make an inference about the population based on the sample. Determine the probability that a sample came from a given population. In order for our definition of probability to work, sampling from the population must be random. Random sampling (different from random assignment: all possible observations in the population have equal chances of selection. Each student in class has an equal chance of being included in the sample. Non-random: 1st two rows: all possible observations must have a constant probability probabilities shouldn"t change if you select more than one observation.
