PSYB01H3 Study Guide - Null Hypothesis, Statistical Inference, Observational Error
Document Summary
Chapter 13 - understanding research results: statistical inference: inferential statistics are important; whether the results yielded in one experiment will come out again if the study was repeated over and over again. Inferential statistics gives the probability that the difference between means reflects o random error rather than a real difference. If this is very low, we reject the possibility that only random or chance error is responsible for the obtained difference in means. Probability: the case of esp: the use of probability in statistical inference can be understood intuitively from this example, example: you test your friend on their esp (extrasensory perception) You test your friend by doing 10 trials and of showing them 5 cards with different symbols on each card; you show these cards twice in a random order in 1 trial random or chance guessing. The null hypothesis is that only random error is operating.
