PSYC 2360 Lecture Notes - Lecture 8: Statistical Significance, Mean Absolute Difference, Statistical Hypothesis Testing

• School: University of Guelph
• Department: Psychology
• Course: PSYC 2360
• Professor: David Stanley

Document Summary

Type i, type ii error, and power. Research findings are based on samples drawn from populations. Inferential statistics allow us to infer what the population is like, based on sample data. Researchers rarely, if ever, study entire populations; their findings are based on a sample data. Researchers are very interested in making statements about the population based on their sample data. The distribution of all the possible values of a statistic (e. g. , correct guesses, mean) Plot the means distribution of sample means. We want to reject the null hypothesis. We know from descriptive statistics that we can describe a population by its mean and standard deviation. If we take samples from the population and plot their means we can create a new distribution the distribution of sample means. Assumes observed data do not differ from what would be expected on the basis of chance. Coin guessing (10 times), correct guess is . 5.