PSYC 210 Quiz: Exam Two Psychology Statistics Review Notes (very helpful)
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Random sample : every member of population has equal chance of being selected (timely, costly) Convenience sample:uses participants that are readily available (more used, not super representative) Replication: may not be able to duplicate results and generalize findings. Volunteer sample: convenience sample when participants choose to participate. Random assignment: every population has an equal chance of being assigned to any level of the independent variable, leveling playing field. We use statistics to make probabilities: best guess based on the likelihood of an outcome. We use probabilityfor inferential statistics: conclusions about a population are based on data from the sample. Personal probability:our best guess based on own beliefs, based on no evidence. Confirmation bias: ignoring information we don"t want to believe is true. Expected relative frequency probability:statistical likelihood of something occurring based on outcome of many trials. Probabilityrequires trials to be independent: outcome does not affect the other outcomes. As sample increases, variability decreases, successes look more like the true population.
