PSYC 2111 Lecture 9: Binomial Test
21 Oct 2016
School
Department
Course
Professor
Document Summary
Goal is to determine if something is more than chance. Example: friend says he can predict the future, so you flip a coin five times. He picks the correct side four out of the five times. Hypothesis: a theory about how the world works; proposed as an explanation for data; posed as statement about various population parameters. Psychic: some ability to predict the future; not perfect but better than chance (greater than. Luck: random chance; right half of the time, wrong half of the time (50% chance of either result: this is our default hypothesis. Hypothesis testing: a method that uses inferential statistics to decide which of the two hypotheses the data support. Likelihood: probability distribution of a statistic, specific to each hypothesis: if result is likely to happen we say the data support the hypothesis. Likelihood for f(correct: psychic: difficult to determine; how psychic, luck: can work out exactly; 50/50 chance each time.
